Barely showing at 17 weeks :(

Anyone else 17 weeks and not showing much? I had an appointment at 15 weeks and my uterus measured right on track and I’ve been listening to the heartbeat on my home doppler once a day and it’s still going strong.. but my girl is either really tiny or she’s hiding. Or my boobs have just gotten so massive that they’re making my stomach look small. I’m worried about her not growing like she should be. This is my first pregnancy which could be why but I guess I just need some reassurance that this is normal.