How to lose weight during pregnancy?

I’m am plus size FTM! I put on most weight in my first trimester (5kg) - constantly hungry.. Then second trimester, I was constantly puking! I almost can’t eat anything. Whatever I eat, I will puke everything out (weight drop through out the whole 2nd trimester). Hence I break my meals into small portion and try to figure out what is the “thing” that makes me wana puke (it was carbs!) After we found out, i tried my best to avoid carbs and indeed puking was lesser - still do but not as miserable. Third trimester was ok as I’m kinda use to the small meals already, my weight didn’t go up.. on a good note, although weight dropped, baby’s weight increase hence my gynae wasn’t concern at all that I lost weight. Lol.. IMO, I think small meals helps in maintaining the weight and doesn’t make u sick after meal. As for exercise, I think lotsa walking will helps, I wore my Fitbit to track my limit. Nearing to due date, u can try climbing stairs (helps u to “pushhh” easier)..