1st trimester bloat

So, when does the 1st trimester bloat go away. I was fine the first few weeks of pregnancy but come week 6 all I’ve been doing is throwing up, eating anything that will just stay down which includes pizza, pj sandwiches, occasional fruit and chips for the saltiness. I know I’m not eating the healthiest right now but my choice are just to keep myself from throwing up every few hours. It’s been extremely difficult. I’m also in Zofran and extremely constipated. This week, my pants don’t fit. Did I already gain so much or is this just the bloat? And when does it go away