Me and My boyfriend Have been having unprotected sex for 3 months now.Early Novemeber I had Symptoms of early pregnancy and thought I May be pregnant but at the end of November.I had my period.First day my period was pinkish and second day it was normal.After a week after my period we had unprotected sex again and one day around November I had a brown spotting in his penis during intercourse.So I thought I'm on my period, a tampon but there was no blood and now my period is late.What could this be?