My wife has OCD and is constantly doubting our relationship and even says she doesn’t find me attractive sometimes

My wife has ocd in many ways and I know it’s very hard for her, between the horrible thoughts and self hatred she feels I know it’s a struggle on the daily. She occasionally sees her specialist but as money can be tight it’s not a super common thing.
Recently her ROCD has been consistently giving her a hard time, she’s mentioned she doesn’t know if we’re meant to be together and stuff like that.
This post is about how she told me she doesn’t know if we’re meant to be together immediately after having sex (I’m talking 30 seconds).
That was a hard one to navigate but I was calm and told her that I’m not upset or hurt and that I know to separate the ocd from you and we’re on the same team. We go to bed and that’s that.
The next night she telling me that the book she is writing, one of the main love interest characters is similar to me in her mind but the main female lead character doesn’t have much chemistry with the guy that she’s originally wrote for her, but another character she’s writing that reminds her of my brother in law, (we aren’t in contact with him anymore for family stuff) anyways, he’s a tall lanky white guy, and for reference I’m a mixed shorter guy.

Also; She definitely wrote the main character after herself to a degree as many authors do.
Anyways, she said how she didn’t find my brother in law unattractive, which was kinda weird but I know how ocd goes.

It progresses into me asking if there’s maybe the obvious contrast difference of body types between my brother in law and me
I’m on the shorter end and she’s in the taller end so there’s maybe 1-2inch difference us. She’s always been insecure of her height, and of course I’ve reassured her that I don’t mind or care at all but she cares about it for only herself which I do understand though.

Basically she admitted that she doesn’t find my height attractive, she likes taller ect, basically a bunch of stuff that kind of just hurt. I have always been strong for her but man this just hurt. I understand if this doesn’t seem very bad but damn I drank myself to sleep and immediately went to work to try to figure my stuff out.
Im in a bad mental state and worry for our marriage.