is this normal?

Domenica • Baby Bear due June 22nd 💕👶🏻
So I was laying on my left and watching YouTube videos and I switched to my back. I noticed that I had a hard bump on my belly! 😳 I started touching it and it was a bit hard. I started tapping on it and it moved slowly down. Is this my baby? I'm 15 weeks but was measuring 5 days ahead