What Causes Sore Breasts And Abdominal Pains While On After Pill?

Hello, iam 19 yrs old. I had my last period on 16/04/11. Which after had intercourse with my boyfriend. We din use protection n sperms were released inside. I took a after pill within 24( or maybe a lil mre). Since then I hv extremely sore breasts back and abdominal pains,. And runny discharge with a strong smelll, is this after effects of the pills or could I be pregnant? Its not yet time for my periods but I am worried n seek helo. Thank you ,