Mixed emotions, Advice?

I'm almost 14 weeks pregnant with twins. I'll be the first to tell you when we found out there was two I went into panic mode. I cried because I was so scared. My body is changing faster than I expected. I'm constantly worried about their well being. All my bad pregnancy symptoms make me miserable. We can't have any tests done to determine syndromes so we don't even know if our babies are healthy. We recieved news last week that I am carrying pre-cancerous cells in my cervix. Some days I'm really good at managing my emotions and my thoughts, other days I am an emotional mess. I'm not sure I'm cut out for this. It seems like one thing after another with this pregnancy. I'm so freaked out. I don't mean to sound ungrateful for this opportunity. God gave it to me and I should be basking in the fact that I'm going to have 2 beautiful children. I don't know know what's wrong with me. Has anyone felt like this before? Is this normal? I'm so lost. Idk what to do.