Babys head?!

Okay I know it's frowned upon but I read that if you're having a perfectly healthy pregnancy its fine. I was checking to see if I'm dilated any with instructions from wikipedia because I've been having menstrual like cramping in my lower stomach and back. When I did it I didn't feel my cervix( puckered lip like feeling) is what they said it would feel like I just felt something hard and round but like I could still feel my insides where it was hard at and not hair or anything. Was that my sons head and does it mean anything specific??