I don't know if I'm pregnant.

Me and my bf have only been having butt sex but just recently I had my period very late.I thought just stress has made it late.But I have also been eating more then my bf does I can eat a full pizza and I will still search for food.my stomache is as hard as a rock and my stomache looks like my prenant cousin's(she is 4 months).Before when I didn't get my period I took several tests and they came back negative but my pregnant cousin said what looked like my period could have been vaginal bleeding.I want to take a test at my doctors without my mom knowing cause if she found out she would kick me out in a heart beat and not feel bad.I really need someones help.I can't look to my bf cause it will scare him and I can't ask his mom cause she has already done enough for me.Someone please give me advice..


Please and thank you
Love,
A scared lonley girl