Shortness of breath and hard coughing

So this is my second baby my first is 9months old and that pregnancy was way different but I think I'm around 7 to 8weeks along the doctors think farther because of the high hcg levels but I had high hcg levels in my first pregnancy but this time around I can't catch my breath it's like I'm fighting for it and I'm coughing so hard that it started to hurt in my stomach. Is this okay or should I be concerned??and did anyone else have high hcg levels and still be as far as along as you thought or carry twins???