Short period/back pain

Hi, I just want to know if the symptoms I am feeling right now is pregnancy symptoms.
I have period last Monday. The flow is moderate and and i had fever. Today is my 3rd day, and my period, I think it stops now. My back also hurts and last Saturday I almost fainted and i have dysmenorrhea for 1hr only but there's no blood. I had a unprotected sex last June 10, and last june 24, we did it again, unprotected. And since it's the first time he imenter it fuly, there's lots of blood.
Please help me. Am I pregnant?