On august 8th I found out I had trichomonas & I took the pills as instructed & a week later I no longer had it my partner took the pills also , we had sex on the 20th but he still needed 3 more pills to be done with the treatment, well the day we had intercourse he came in me but I took Postinor 2 the next day & today on 24th I had some spotting what could it mean.? I had my period from the 14th to the 19th.