My Periods Comes And Goes Eriod Cramping That Comes And Goes, Period Due Almost Two Weeks Away, What Could This Be?

Eriod cramping that comes and goes, period due almost two weeks away, what could this be? - my periods comes and goes

I forgot to take birth control for over a month. A week later I started my period. My immediate future is 1/30/2010. But three days were like period cramps that comes and goes. Thus, ol HRT?