help please

So I'm currently 33 weeks pregnant and I do have thyroid issues that are making it hard for me to lose weight. With my first child I started out at 135 and ended at 191. We were constantly on the go but I only lost 20 pounds but once it got cold out my weight came back plus some eating out and holidays killed me So I brought an exercise bike which is currently outside because I had no help bringing it in. But now I'm 220 😩😩😩 which is very sad I look like a little short fat person like violet from Willy wonka but I'm not blue like a blueberry lol 😂 what are your eating habits how did you lose all your weight my goal is to be 80 pounds lighter by December if that's even possible