Am I pregnant?

I had sex 4 times in the same night with this guy I was talking for a couple months. 
We had unprotected sex all 4 times . 
I know stupid of me .
I think I'm pregnant 
I have a high fever my body keeps heating up
I have cramping in my stomach and lower back pain and a headache and I'm tired 
And my breast are killing me they hurt so bad But I feel like I'm freaking my self out.
I get my period in 2 days .
I have no idea what to do .