I had my last period 12/17 - 12/22 cycle is 27 days. He ejaculated in me on 12/26 took Plan B on 12/27 about 26 hours later. Last few days been experiencing cramping in my back to my stomach & i feel it down my left leg. Headaches. Now today I've been feeling nauseous, light-headedness &:the cleaner smells terrible. . 6 days until my next period. Last month I took plan b & did not experience drawn out side effects