I took the plan b pill on the 3rd day after intercourse. I got my period about 8-12 days before intercourse, then after taking the plan b pill i got my period again 6 days after taking the pill (8 days after intercourse). My period is very irregular, sometimes i dont get it for 5-9 months. But before intercourse i got my period 2 months in a row (1 period one month, another period the following month,----- this was before i had sex that my period came two months in a row). My period currently is very heavy. Is this normal? Should i take a test?