does OB complete petite prenatal vitamins affect the weight?

My husband made a comment that I need to stop taking my prenatal vitamins because I'm starting to look broad and putting on too much weight. He said my stomach isn't growing but I'm putting on too much pounds. I'm 22 weeks and 6 days and I know I have a very small bump. Before the pregnancy I was around 140, and now I'm around 164.  I barely eat junk food or even eat a lot. I appreciate him being honest with me but it really hurt me. I'm not working and stay at home all day and it is depressing me. I don't want to stop taking the prenatal because I want a healthy baby. However does it affect your weight?