Movement!?!

Alia • Me and my husband are having our first baby(:
I'm average size and about to be 20 weeks tomorrow and I think.I have been feeling the baby move since 19 and I'm starting to feel it more and more I think I can even feel it a little outside of the belly! Only when I'm laying down and not doing anything else . I was just wondering if this is even possible I thought for first time pregnancys you don't start feeling them move till 25 week? I was thinking maybe I was just tricking myself into feeling it because I want to feel it already but I dooonntt know. I also heard that with baby boys you feel them move sooner because they grow faster then baby girls but I honestly don't know it's just something I ready on Google. But when did you mamas start to feel your baby move?(: