Emergency Contraceptive

Hi my name is Izzy. I'm 18 years old and about 10 hours ago I had protected sex. However,  I think the condom broke. When he came I felt something wet in my vagina (it could of just been me having an orgasm) but I don't know. After he came he turned around and took the condom off, I asked if the condom broke and he said no.  I'm really unsure if I should take the pill or any emergency contraceptive. I am ovulating but my ovulation date is two days from now. Does anyone have any advice??? I feel so conflicted right now. I'm also scared the pill will mess up my period. I'm regular (once month - I ovulate exactly 14 days after my period and my period is 4 days and not heavy)