Can't breathe

I don't know what to do. I'm a ftm and I'm 23wks as of now. And for the past week I've been feeling like I can't breathe. I constantly wake up gasping for air. And I feel like I can't breathe right now. It's gotten so bad that my stomach is hurting and I feel dizzy and I feel like I have to vomit. My MIL said its common but idk :( it's currently 12:44 am by me and I've been like this for about 1hr 1/2 now. Help?? Idk what to do. Side note: I'm not sleeping on my back either