Weight and pregnancy

This is my 7th pregnancy and so far my 3rd successful one. I am 14 weeks 6 days. Pre pregnancy I was just a few oz from 200 lb weighing my self every other day out of habit. I have noticed I'm not gaining at all. I have not been sick every day or throwing up every day.i eat 3 times a day and snacks. Healthy and bad whatever I'm feeling. As of today I am 188.4 lbs. I have asked my doc he said we will worry when I get to the 180s. I've never had this problem with either of my living children. I was sick with my daughter and never lost weight. my son I was not sick and didn't. Should I wait and see what he says at my next appointment (may 15th) or call him Monday since his office is closed over the weekend.