How to differ between actual feelings and the symptoms of PMDD and OCD

This will be a long text and i am really thankful if anyone reads this.

I dont really know where to go or what to do so i thought i might ask here for some opinions or even help

My Girlfriend has OCD and PMDD. I have to say she is very impressive with how she‘s dealing with that. She takes so many different drugs, has a very strict diet and has gone 5 years trough therapie. I cant express how much credit she deserves For going through this and still be the most loveable human i ever met.

We met each other first time in January and talked nearly everyday at work since then. In March we started texting and it was sooo intense, we had so many deep messages it was magical.

Since May we are in a Relationship and many things changed.

We dont really write that much anymore and we dont write deep at all. I gotta admit from my past relationships i was used to trying to see each other as much as possible - especially at the beginning of a Relationship. I try to read a lot about her conditions and talk to her and i also ordered many books so i get a better understanding that she needs more space for herself than other, and for me its hard to see the difference between: its because of her condition / she doesnt feel love anymore or she feels it less

I have a few Examples:
First we wrote very deep and intense, thats nearly completely gone

We basically see us every weekend, but on weekdays she says its hard for her.
At the beginning i said we could try Tuesday and Thursday - after we did that one time we changed that to Wednesday, but only if she feels like it

She doesnt like to talk on the phone so if i want to hear her i have to ask, dont just call (also because of the OCD)

I dont have to work right now so i thought we could see each other a bit more often. For example:
Beginning on Thursday we couldnt see each other because it was my 30th. Birthday on Sunday and i was with my Friends til Monday. At first she said i should come on Tuesday so we can see each other.
Then i figured - she doesnt have to work on Thursday so maybe i can also come on Wedneysday and spend the night. - she said i can come at wednesday but not tuesday then and she wasnt sure if i should spend the night. After that i told her that i feel a little bit insecure about how often she wants to see me - she said no she would love to have me over for the night and i dont have to worry
I said i dont wanna pressure her into anything she doesnt want and that those are my problems and i have to deal with them, its probably not her fault but she still said she really wants me over

In the night from saturday to sunday (my birthday was on sunday) she sent me a good night text and that she wishes me a fun night with my friends at exactly 23:56. Four Minutes before my birthday. Her Text Next morning was very sweet and i can understand if she was tired the night before, but since it was 4 minutes i thought she could at least wrote like: happy Birthday ill text you After i slept or something.

On Sunday she didnt ask if we want to hear us for like 10 Minutes. I asked and on the phone she said she thought i would tell her when i have time and didnt want to interrupt my time with my friends.

I never had a Girlfriend with these Conditions so for my Brain its a battle between:
You know how your other Relationship worked: these are signs that she thought she had feelings but maybe now realised she doesnt.
Or:
She has Conditions you dont know enough about to jugde anything.

So because of that i read very much and ordered the books and sometimes talk to her. I dont dare to tell her how deeply insecure i feel because she doesnt deserve pressure but i try to talk about those specific situations with her

I just feel so bad. She deserves someone who trusts her when she says: everything is fine - why cant i?
Why am i so insecure

Then i sometimes think: my feelings do have a right to exist as well…

For now i think i have to learn everything i can about the conditions, maybe this will help me gain confidence.

And also - i have to learn more about it so i can be an understanding boyfriend to her. Just to get this straight at the Moment i try not to talk too much to her because i think its unfair. These are my Problems and probably those arent really that bad when i got a better understanding of her feelings and conditions.

So i guess all i am asking is:
Is it okay that i have those thoughts or am i overreacting?
Am i even good for her if i get those Insecuritys after one month of our relationship already
Could it be both: she lost feelings and its her conditon?

Thanks in Advance and sorry for my Bad english as well