16 week flutters.

I'm nearly 16 weeks and today after swimming I was laying by the pool and swore I felt a little pop right next to my belly button, could that have been baby?? I'm a ftm so I don't know when that's supposed to start, but it didn't feel like gas and I'm not hungry. It was weird and exciting and I just want to know if it's possible that that's what it was! :)