Okay I'm 19 years old, I did have unprotected sex in March and April, I think I had my period in the beginning of may but it lasted 2 days and now I spotted yesterday my periods last ad least 4 days and this has only lasted one day. Not a normal looking period for me it was a dark red then almost white now I'm having weird feelings around my sides and very minor cramps. I took a pregnancy test and it came out positive but I took 2 more and they were negative. I don't know what to think or if I am pregnant? any advice?