Illinois Workers' Compensation?

[hewlett]

I got injured at work about 3 months ago i filled out the Workman's comp file with my company and went to see a doctor i got a MRI and the doctor told me i have Herniated Discs L4-L5, L5-S1 so he started with physical therapy i did this for a month then the company insurance called me and told me they see no improvement's so they wont pay for more physical therapy. So i went to visit my doctor again and told him what the insurance just told me and he said that he will schedule a epidural injection for my lower back, two days past and the insurance company calls me and tells me that they are denying the injection at this time so i wait for a week and the doctor calls me and tells me that we are going to set up another injection. Two days pass and the insurance denied the second one two. I am in allot of pain and the pain killers are not helping any more i sleep two hours a day i cant eat or walk and those people are playing games with me.Do i have a case against the insurance company should i sue them?