You need to see a doctor immediately, and I mean immediately.
It sounds like you have both a bladder infection and a kidney infection.
All of your symptoms are classic for a urinary tract infection and the back pain is from a kidney infection.
You need treatment with antibiotics, a urinalysis and a culture and sensitivity done on your urine to be sure that the correct antibiotic is prescribed.
Without treatment you can develop kidney damage that can be permanent.
If you have no insurance, I would suggest you go to a hospital emergency room, or a clinic that will see patients without insurance.
Please see a doctor right away.
Fran