I Had Unprotected Sex Roughly Around Ovulation Time. I Had

I had unprotected sex roughly around ovulation time. I had brown CM for the week my period was due. I did get a period after for about 2 days. much shorter than usual buy pretty heavy. the bleeding is over and I still feel pregnant. lower back pain and bloating/upset stomach my breasts are no longer sensitive and i have a constant metal taste in my mouth. super hungry and bloated. Can I be pregnant, or did I have a period?