Hi, I Am 32 Years, I Took Emergency Oral Contraceptive

Hi,
I am 32 years, I took emergency oral contraceptive pills after an unprotected sex with my boyfriend. My period can a week earlier, and did not flow as normal. I noticed that when I wipe deep from inside, I would have blood stains on the tissue and this is the eight day since my period came. I would like to know the possible cause of this and probably an advice of what next to do. This is equally the first time am experiencing this.