yeah, try not to worry too much about it. if you want to do right by your baby just eat healthy and make all of your appointments. take your vitamins. read your pregnancy books. you know how to take good care of yourself and that's the best thing you can do. if there are concerns, wouldn't your doctor have mentioned them?
body shape and size makes a huge difference in how you show. you can have a long or short torso, the baby can be sticking out more or less, you can be tall or petite, you may have started out with more fat on your body and that might hide the round shape of the belly, some women have bigger or smaller boobs or wider or narrower pelvis and hips that effect how they carry their pregnant belly. i could go on and on. people are always going to make comments. today a little old lady asked me if i was having twins. i said no, just one big baby. you can't let that worry, upset or offend you or you're always going to be worried, upset and offended. there are a hundred old wives tales and false perceptions that people have about pregnancy.
do your best not to overthink it. talk to your doctor at your next appointment and mention that you are anxious about it. maybe they will send you for an ultrasound to check the baby's size. if you feel okay and baby is moving and the doctor hasn't said anything then you should do your best to relax and not put pressure on yourself to conform to someone else's idea of what your pregnant body should look like.
i know i'm being long winded but i really can sympathize because i was overweight when i got pregnant and i was so worried about how it was going to affect the baby. everything i had read said you should lose weight before getting pregnant because being overweight can do this, that and the other to the baby. there was nothing reassuring, only bad stuff. well, now i know that my weight had no negative effect and i had nothing to worry about. it's only natural to worry and no one can blame you for that but if you are taking good care of your health then that is the very best you can do.