Little weight gain at 32 weeks

Allison • Violet Ann born 10/7/16
I was 5'4" and 123 lbs when i got pregnant, so on the low end of average. I did not have any real weight loss in the first trimester like some women do. I am 32 weeks now and for the past couple weeks I have been hovering around 133-134lbs. So only about 10 lbs total gain. I eat very healthy and whenever I'm hungry. Everyone comments how tiny my bump is. My doctor hasn't seemed concerned, but i have this nagging feeling my little girl isn't growing properly! She was perfect at my 19 week scan, but no scan since so i just feel so unsure! Anyone not gain much but have a healthy baby cooking in there? ☺