Struggling with pregnancy body

When I got pregnant I weighed 155 lbs (5 ft 7), the first trimester I lost just a couple pounds, 153 at my first OB appt at 11 weeks. Now I'm 19 weeks (tomorrow) and weight fluctuates between 158-159 lbs. I feel like I'm eating all the time, I'm making healthy choices on what I eat for the most part.. but I'm really struggling with my body right now. I walk our dog 3 miles almost everyday and add gym visits about 3x times a week with light cardio and free weights. I've definitely developed a low bump below my belly button, but I feel more fat than pregnant. My husband can't keep his hands off me, but I'm so uncomfortable in this awkward stage. I don't think I look pregnant and these body changes have been really hard for me. We were about to go out to dinner tonight, I got dressed and just couldn't bring myself to leave the house. I felt itchy in my own skin and wanted the clothing off me immediately. 

Anyone have advice on this stage of the pregnancy? How do I overcome this idea of feeling fat or embrace my changing body. 

Thanks, and congrats to all the mamas!