Had intercourse around days was to be fertile. came on my cycle four days early,was heavy.lasted 5 daysperiod are usually 28 day cycle.whats going on?

Hormone imbalance: Every women will have some irregularity in their cycle from time to time . Have to watch next couple if cycles as well. Sometimes when you have an irreg cycle the next 2 or 3 can be s little irreg as well.

Menses: Your period and hormonal levels can fluctuate at times, affected by stress, fatigue, lack of sleep, recent illness. Some women report an earlier period after intercourse, not clear if there is a mechanical or hormonal cause. Use protection to avoid unwanted pregnancy. If irregular periods continue for 3 months or longer, see a gynecologist.