Everytime I pee it hurts and my lower back hurts also could I be pregnant?

Maybe a coincident. Painful urination and low back ache are more likely to be signs of a urinary tract infection ( bladder or kidney infection) . If you are concerned about pregnancy a pregnancy test should be performed. In addition to that, a urine test should be done to rule out a bladder or kidney infection.
Possible infection. This could be a urinary tract infection or an infection in your kidneys. See your medical doctor.