Constipation and nausea...

Hi all,
​I'm at my seventh week, working on my eighth and have had really bad constipation. I haven't had a lot of time for excercise at night but my job requires a lot of walking around. Unfortunately, most things that I try to eat make me nauseous and I can't even put it in my mouth.
​So I'm not only eating very little, but only certain things go down like soup and crackers. I've had a few apples as well. Last night I had to get take out and was able to eat the sandwhich I bought. But nothing since Saturday morning because of this constipation. Had terrible sharp pains/gas pains in bed last night but nothing came of it.
​Anyone else have this problem?