Hi there! I am eighteen years old and have been having some pregnant symptoms. I skipped my period the month of April, finally began bleeding 4 days ago but wasn t at all like my normal period. Ended with brown spotting. I have a little belly bulge that never used to be there, strange nipples, and diarrhea/sometimes constipated. i m wondering if you can help me determine what is going on. I took 3 pee tests, all came back negative