Yes, I do think this is normal. Unfortunatley, we live in a society that equates thinness with beuaty and sexiness. If he does dump you because of the changes your body is going through, then he's not worth it, even though he is the father of your child.
Yes, Im bigger now than what I was 20 weeks ago. Im at the tail end of my non-maternity clothes and will have to go shopping next week. I don't care. It's not like I've gained weight due to poor personal care. In most of my clothes, though, I just look as though I'm "curvy", which is fine. If people want to think I'm fat, that's their problem, not mine. I have a husband who thinks I'm sexy. I'm carrying life inside of me.
My husband thinks I'm sexier now at six months pregnant than what I was six years ago when we married. He's in awe of my body and the little baby inside of me.
When I was dating, I always figured that if a guy didn't like me for me he wasn't worth my time.
I do want to fit into my non-maternity clothes as soon as I can after the baby. That's because I do not shopping and I don't want to have to buy anything new if I have stuff that's already good and wearable. (Plus, I figure that poking around a thrift store or any other store with a newborn will be even more less fun than shopping without a baby.)