hey im 19 and i had un protected sex like in dec.everysince them i been feelin diff.but still had periods.but have been diff.my blood have been like a redish brown not heavy or light painful cramps.i 1st couldnt see my belly button but its clear to see my belly buttuon i feel like imma throw up wen i drink soda nd eat ice cream...i diss like cake nd cupcake....i feel my heart beating fast alot also....... i need help please