I can appreciate the struggle,
@EveHarrington . Relationships are challenging enough for people who don't have PTSD, and they're no easier when only one person in the relationship has PTSD. Try both people, and you'll start seeing what I'm having to adjust to. It's not for the faint of heart, and it requires a lot of patience (and positive mindfulness exercises).
One of the things I had to realize first is that what you may consider "normal", and what someone else considers "normal", are two vastly different things. There is nothing wrong with your sense of "normal", any more than mine, or anyone else's, really. Grandpa Simpson once complained in an old episode, "I used to be 'with it', and then they changed what 'it' was. And now I have no idea what 'it' is, and it's scary!"
It's okay to be scared, Eve. It means you're paying attention to what's going on. But one of the things that regularly gets us into messes (especially in relationships) is when we over-think the situation we're in, because we're not used to it. I'm not very good at relationships, and quite frankly I'm still clueless as to how they're supposed to work (and I'm a few years older than you.) That's not to say I've never had a good relationship in my life... it's just that the few that were good, genuine partners, I felt like running because I wasn't used to being treated like a human being.
I was so used to being abused, and treated like a sex object with an ATM card, that I couldn't trust someone who treated me kindly -- because I always wondered in the back of my mind when they'd stop pretending. I sabotaged at least two good relationships that way, and it sucks. I sabotaged them because I was too scared of being something I was taught I wasn't: myself.
Again, what you are experiencing isn't unusual for PTSD survivors. As others have mentioned, I don't know your past so I can't say "oh, just do this and get over it." There is not such thing as "get over it", and I hate that phrase. We don't "get over" anything, we work through it. Unfortunately, trust issues are something everyone (with or without PTSD), has to work through. Some people make the choice of putting the risk of getting hurt again at a higher value than continuing the cycle of abuse. Some people don't, and that's when the cycle of abuse is continued onto whomever one encounters.
Choices, gotta love em. Relationships aren't easy, they're not meant to be; that's why there isn't a how-to manual on them. Nothing worthwhile is ever going to be easy, and they're not without a little bit of pain that provides us with the opportunity for growth. My best friend from college, Dave, once gave me great advice: you must first become comfortable with being alone, only then are you ready to be with anyone else.
Two months is pretty good, and I encourage you to work on keeping the communication lines open with your partner. I'm going on two years now, and it's the only reason the relationship's lasted as long as it has with a partner who also has abuse-related PTSD.
You may feel like you're going through hell... keep going. The only hell that's worse is allowing your fear of being who you are, sabotage a potentially great relationship. Good luck.