Help plz!!!

Ally • "Keep it mellow" Marshmallow
okay, so December 6 me and my SO had sex and the condom broke. I took a morning after pill, but I thought I got prego.. Its been almost 10 weeks since that happened and I started my period last Friday and im still on it today.. That's over a week. Plus this is freaking me out because my moms mom had her period for the first 7 months of pregnancy... What to do?