Feeling nervous

I've felt very not-pregnant the past 2 days. Nausea has faded so I feel like my normal (more bloated) self. I've noticed my nipples are dark and huge though. I had a breast augmentation about 3 years ago and didn't think they would change much during pregnancy but they have already gone up a cup size. First dr appt and ultrasound are Wednesday so nervous to see what's happening inside me!!