Cervical cancer or something else?

I will try to be brief...I had a abnormal pap in 1995 and was diagnosed with HPV which, ended in cryosurgery. Since then, I have had normal paps and 3 babies. After having my last son, which, will be 3 yrs in June, I've had severe bleeding during and after intercouse. It happens 8 out of 10 times of us being intimate. One time afterwards when I got up blood began running down my legs and the most recent time, when I got in the shower pieces started falling out in the tub and some were also on my husband. My period has become increasingly more painful (to the point I want to stay in the bed for days). I have severe cramps on any given day. I have unexplained pain on my entire left side and with each day my lower back pain is getting worse. It hurts so bad that it makes my hips ache. The other problem is when I go to bathroom sometime it hurts to urinate or have a bowel movement...it hurts like this extreme pressure, to the point that I avoid going to the restroom at times. I've been wearing pantyliners everyday for the last 3 yrs because of the discharge that has become a constant. I've gone to the dr twice and each time they said I've had a bacterial infection and given me antibotics and nothing happens...I'm UNINSURED!!! and I'm getting really worried that I have cervical cancer (from my research over the last 3 yrs). CAN THIS BE CERVICAL CANCER OR SOMETHING ELSE?