AITAH for wanting to pay less rent than my brother after I gave up my room for him and his girlfriend?

Hey reddit so I wanted to know if I'm the AH for wanting to pay less in rent than my brother after giving up my room for him and his girlfriend. So my brother and his girlfriend recently moved back in with our family after his contract was finished in the military. The room was originally mine for about 4 years, but after he got out of the military he moved back home with us because he couldn't afford everything on his own since cost of living is so high, I don't have a problem with him moving back in, I love and missed my brother while he was gone so I'm excited that he's back, my only issue is that my parents charge me $700 a month for rent and that also covers my utilities and my portion of the phone bill since we're on the same family plan, my issue is that when he moved in he brought his girlfriend with him who I also adore, she's like a sister to me and overall is a wonderful person but in order for them to move in since there are 2 of them we agreed that they could take my room so it would be more comfortable for them, and now I sleep on the couch, since my 2 sisters share the other spare room, and my parents obviously have the master bedroom, I really don't mind the couch that part doesn't bother me, what bothers me is that he and his girlfriend both work and both make more than me but there rent is still only $700 month, and I just feel like that since I now don't have a bedroom and all my stuff is in boxes in the garage that I should pay less because now I really have no privacy, or when I'm stressed out I have nowhere to go to just decompress, I kinda just feel like I have nothing, even something as simple as watching TV is an issue since I'm on the couch in the living room so I have to share it with everyone in the house, and even when I do get to "watch" something it's not always what I like because it has to be something they're ok with. Again I love my brother and everyone in our house and I know we're all doing the best we can to make ends meet, I just think it's unfair for me to pay the same rent as 2 people with a room while I only a couch in the living room. So reddit would I be the AH if I asked my parents to reduce my rent since I don't have a room anymore?