Need Advice Bad, I'm messing up but i love my girlfriend

So quick filler, I love my girlfriend like nobody else and I know this sounds incredibly cheesy but I really believe it and it's real to me. She is 17 weeks pregnant so in her 2nd trimester and she is at the avoidance and hate me phase. I am 23 and she is 27 and neither of us have had kids before this would be our first. We only dated for maybe 2 months before she got pregnant and we already live together.

The main issue is she nitpick at me for everything and it literally feels like I can't do anything right EVER. We had a big argument halfway through her 1st trimester because I went through her phone after the emotional disconnection started because I thought she was cheating on me. (Filler I got divorced when I was 22 because my ex left me for someone else, so I was definitely insecure to the matter and she is previously divorced as well for reasons I never asked). Needless to say I have been trying to give her space for the last couple weeks but it's literally not working. I've started going to therapy to feel better about being alone and just being happy and not dependent but I fear she no longer sees me as a capable partner and/or potential partner for life. I want to marry her and be a happy family. She now gets mad at me for helping out too much saying she is not "handicapped " and is irritated by literally everything I say and do. I even try to sleep in our spare room some nights to give her extra space but the distance just never closes. She hates talking to me, she hates being around me, and she's never said "I don't love you" but even when I tell her I love her now she either shrugs or says "ok".

I've recently started going to the gym and I know the biggest thing with her is she always tells me I never listen and just try to do everything my way, but it's so hard to remember exactly how she likes everything done and be perfect. I'm literally drowning in trying to work on myself and figure out what's wrong with me but I can't get it right. I just want my baby back and I really want to be a happy family when our baby girl is born. I have 0 parenting skills and minimal life skills that she succeeds in all. She is literally amazing and perfect but the experience gap kills me too. I literally don't know what to do to make her happy if the space I'm giving still is not enough when we haven't touched in months and our only conversations tend to be arguments about something she hates that I've done.

I apologize for the length but it definitely represents my stress.

Also, she is completely against the idea of doing things together even small things. She wants only space and more space rn like me going away all the way kinda space. I've tried offering little date ideas and stuff but they all get shot down. She practically lives in her phone with her headphones in at this point.

Also, we work together because we got hired to the same job so ya we see each other 24/7 but still work is work. She is so happy and nice with literally everyone but me. She'll be really cute with our dogs then I'll say literally anything and catch a look or comment telling me it'd be better had I not spoke at all.

I swear on my life she is not a bad person and I really love her but I really need to some information on what I can do to win her back because I fear she might give up on me too at some point and I'll be forced into a coparenting role that would ruin all of my dreams for a happy family.

Well it's at the point now where she is essentially only speaking to me when she has mean stuff to say and literally doesn't even want me around. She officially makes all the decisions about the baby and it's "hers". I literally don't know what to do because it gets worse everyday and the space is not helping if anything it's making it easier for her to be mean when she does see me. I love her so much and I know this isn't her but our relationship is deteriorating and she might just give up and leave me.