I Am Have Lower Back Pain, Hip Pain And On

I am have lower back pain, hip pain and on top of my leg and thigh to groin ara, I am scheduled for epidural Jan. 4th, I was taking 3 advil in morning and in afternoon and evening taking hydrocodone. I was not getting a 100% relief, so Dr. told me to quit taking Hydrocodone and take Naproxen Sodium 550MG, twice daily. I did , I thought it was working , but seems after about 5hours it wears off. I take it at 6 in morning and 6 at night. I am up now because I am hurting probably an 8, can't sleep , can I take some advil