okay so me and my boyfriend had unprotected sex many times and the third week of march i took the plan B pill, then i started getting heavy bleeding im not sure if it was my period or the side affects from the plan B , because i was due on my period on the 20th of march. Well now its april and ive been stressing so much ever since and i took a few tests and they came out negative but that was because it was too early to detect anything anyways during the last week of march. And now its April 8 and i have very sore and tender breasts and mood swings as well as feeling very tired its been 3 WEEKS since i took the plan B pill, i dont know if its possible to get the side effects this later on. Please help i could really use it , thank you