So Me And My Boyfriend Had Unprotected Sex September 19th

so me and my boyfriend had unprotected sex September 19th which is 2 weeks ago. I got a light period the 21st to the 25th. I ve been having bad cramps for a week I m always tired & always hungry. I feel nauseous 24/7 throughout the day. I feel different but at the same time I don t wanna be pregnant. I m supposed to be getting my period Sunday October 11th but I've had white and pinkish discharge