My (26M) and GF (20F) have been fighting for over 2 weeks because of her pms , this repeats every month, i do not understand how can i help her?

for reference: i come from a upper middle-class background, but i managed to build myself a successful business which requires me to work really hard as i am using borrowed money for funds, Whereas she is a trust fund kid with her dad owning multiple businesses, big house, expensive cars and she never had to worry about her future, we have been in a LDR for 2 years . looks wise i am an 8 and she's a 7. we meet 3-4 times a year because of the distance, our first 6 months had literally zero fights (10/10, rating for those 6 months), then next 6 months we started having some fights (8/10), next 6 months fights increased exponentially (5/10) and for the last 6 months everything is a fight (3/10). we are in love and definitely have great chemistry. but as soon as her pms hits, she just forgets who i am, everything of mine becomes frustrating or irritating to her, she would fight and say horrible stuff and would forget that she said it, and would later on swear she didn't say it, i write a journal every night of what happened each day, and for the past 1 year every 3rd day even without her pms is a basic fight panning out , where she blocks me from everywhere and returns when she feels like, i am a pretty chill guy, the fights are for reasons like, "why are you going back to work , talk to me more" , "you don't buy me clothes randomly " (she sent me a link of a dress she liked and i asked her is she actually gonna wear it but she said she likes collecting , she has zero intentions of wearing it. she brings up my past mistakes from a year ago and get upset , she has told me she resents me a few times because of my past mistakes. One of the mistakes being " me sick in the hospital on her birthday and not being able to celebrate it with her " i collapsed 2 days before her birthday and lost my vision and had to be admitted to the hospital, ( i was later discharged without any serious concerns). she asked for proof if i actually was in the hospital or just making stuff up so as to not celebrate her birthday because apparently i had forgotten her birthday (although my pre ordered cake her reached that morning, i couldn't get the flowers and her gift delivered, i left them for last couple of days). she considered her birthday ruined and still blames me for not pre planning her flowers and gift, after her birthday every day for next 2 months was a fight , starting how she hates me for ruining her birthday to something new every time by the end of it. (i got her gift and flowers delivered after i was discharged and also bought her an expensive dress as a compensation gift because i felt bad). this was 8 months ago and her birthday still is an issue, she considers herself as a prize for me to win over, has stated that multiple times, she's kinda fat , she knows it and wants to lose that extra weight , i have always reassured her regarding her body which she was very insecure about , but now she takes the compliments or my reassurance as an entitlement as something she deserves because of her looks (she has actually gained more weight) . coming to the last 2 weeks, they have been hell, my business took a big hit when somebody copied my trademark and i had to pursue legal options to make them stop, because of which my brand faced a lot of backlash, as the impersonator sold cheap quality products under my brand name. i explained my situation to her but to no avail ( now that i am thinking and typing everything out, this relationship really feels like beyond saving). in the first week , i was barely eating anything in 2-3 days and not going anywhere (not even gym which i never miss). i told her i needed to work like this for at least a week to make sure my business goes back on again, or else i am gonna be facing severe losses, my stress level was all time high and all she did was make our situation worse, neither of us even remember a single reason of why she was fighting me, she would keep on calling constantly until i pick up (literally 100s of times) ( also blocking her is not an option, as soon as i block her, she goes self destructive, which she has done twice , hit her head on the wall (in front of me on facetime when i unblocked her and once she cut herself multiple places and keeps on crying and calling her friends asking them to ask to me to unblock her) .she has her uni finals in a month and she's still wasting her time fighting , arguing , non stop, 3 days before posting this i went completely cold and told her i dont wanna talk to her at any cost, i'm not blocking her but she needs to study and let me work, she has been calm and arguing less (maybe because we are not talking at all, so she doesn't really get a chance to start a fight, i just check up on her studies once a day that's it). i am open to all suggestions and advices.