Implantation or period?

Abby

A week after I had sex, I started to feel very sick. I've been sick for about 2 to 3 weeks now. 3 days ago, I started to have light pink on and off spotting. I get sick whenever I am in front of food and have been bloated. I have light stomach cramps like I'm about to get my period, but I get nothing. I do have PCOS so I don't know if it's my period Coming or if it's a pregnancy symptom.