Weight

Okay so I got pregnant unexpectedly (was on BC) and was not at a weight I was happy with (5'6" 155lbs) I am now 20weeks and even though I have not gained much weight at all, due to bad morning sickness, (maybe 7lbs) I am having a really hard time feeling even confident and pregnant. I have been doing my best to eat healthier (I do not eat fast food or much junk food) and I walk as much as possible. I also don't think it helps that I have big boobs (34ddd/36dd). But I do not want to be one of those people who constantly hates on being pregnant because I'm too worried about being fat or overweight. I want to stay healthy but I want to know what other people do to make sure you maintain a healthy weight & feel confident about being pregnant