Hello. I come off my period a week ago tomorrow, so I'm not due on for a while but yet I have cramps which feel like the type of cramps when I am due on my period. I felt sick yesterday morning but I'm not sure if its because I didn't have anything to eat but I didn't feel hungry.. I'm 18 years old and sexually active, I have had unprotected sex with my boyfriend for the last few months but I doubt I could be pregnant as I have had this pain once before, I just don't know what it is or what to do..