Sooo for the last 5 months my periods been on time and also I'm irregular and I usually go for 5 days but this month has been crazy so my boyfriend and I are very sexual active and we have been having sex like cray cray.... but my period only lasted three days and it came on time it started off heavy but then on the third day it became brown and stop now I'm spotting and this usually don't happen because I normally bleed for the five days and then it stop.. soo I really don't know what's going on... need answers