Im on birth control and took like 2-3 plan bs in august. havent gotten my period for august. i been cramping on and off! im scared that i might be pregnant. took a bunch of pregnancy tests and came out negative. whats going on?

A pregnancy test will be positive as soon as the first day of your missed period. Plan B has large amounts of hormones and is very disruptive to your body. It can cause bleeding to be delayed, more heavy or longer lasting. It can also cause breast tenderness, nausea, fatigue and headaches. Consistent daily oral contraceptive pill use protects you against pregnancy without the use of Plan B.