Hello! I Am Very Concerned About A Few Of The

Hello! I am very concerned about a few of the side effects the plan b pill has given me. I had unprotected sex (with withdrawal, although I know that isn't enough) about a week ago and took the take action pill about 8 hours after. I am not sure if I was ovulating, but I had my period about a week before the sex happened. I am due for my next in about a week and a half and have experienced extreme nausea, fatigue, bloatedness and now a week after cramping and a fizzy feeling in my stomach. I know that the side effects usually are supposed to last a few days but these have gone on for a week and continue at the same strength. I am also stressed if that can be a factor. I have been told it is too early to test but what is the possibility of me being pregnant? Please help.