So nervous

So, I go for my first appointment on Wednesday and I am extremely nervous! I am apparently 7 weeks and 6 days today. I haven't thrown up, yet, but I've only thrown up twice my whole life (from what I can remember), so To throw up is very uncommon for me. The symptoms I've had so far are hunger, extreme exhaustion,  sore breast, and a little bit of nausea. I'm so scared because 2 of my friends have had miscarriages the past month or so, and they happened around their 7-8 week timeframe. I feel bad for saying this, but I don't feel pregnant, even though I am (I took 4 tests- all VERY positive). I don't know if it's because I've not had the throwing up symptom, or what. I also feel like I'm trying not to get too connected until I see the ultrasound Wednesday, because I don't want to be crushed even more than what I will be, if something does happen. :( Has anyone else ever felt like this? I feel awful for not having that connection feeling just yet.. :(