How much is normal to have gained in the 1st trimester? With my 1st over alll I gained about 100lbs I was 85lbs when I found out I was pregnant then by the end I was 185lbs. Don’t remember throughout the pregnancy though. This time around I started at 110-112 ish and I’m already 127lbs at 21 weeks but gained that in about a month and a half and I don’t eat much. I’m worried I’m going to gain the same amount as my 1st and that terrifies me since i was so unhealthy with her.