15 weeks and I feel so tiny

I still feel like I have no bump and I'm 15 weeks. Baby is in there, seen it on ultrasounds and listen to the heartbeat on doppler, but I was already showing like a decent amount with my son by now and I'm barely showing at all.. I feel like right now I just look chubby. :( anyone else not showing yet? And if you are when did you start being able to be like "yeah I look pregnant"