5 months and depressed

I've been crying so much lately but over one thing. My body. I'm used to weighing 110 lbs. and have nice slim curves. My husband constantly lets me know I'm sexy and beautiful but today when I was talking about how upset I was he said "You'll be sexy again after she's born" and then looked at me knowing it came out wrong. I know he didn't mean it but it hit me so hard. I do my exercises and walk almost everyday, I'm just so sad that my body is changing. I know I signed on for this when conceiving and I knew it would happen I just didn't think it would bother me so much. Is it normal to be sad over this? Will I get over it soon?