Did Cervical Epidural trigger debilitating headaches?

A couple of months ago, I had an MRI where my spinal MD diagnosed me with degenerative disc problems in C5 and C6.  Since then I have received 3 epidural steroid injections in my neck.  The problem is, now I have horrible debilitating headaches 2-3 times a week which can last as long as 25 hours (most often 6-12 hrs).  I always wake up with these headaches, they do not start during the daytime and my pain meds cannot touch them - pain meds I've had include Norco and Oxycodone (not at same time).  They are much worse than the original neck/shoulder problems that I was trying to get fixed! The pain seems to center at the base of my skull on the right side and there is no position or medication that can give me relief; I just have to wait it out.  I also have incredibly sore jaw muscles when I awake - even after using a night guard to prevent teeth grinding.  I never had any bruxism or headache problem before the epidural so I'm sure it is the cause.  My current pain MD just keeps giving me stronger meds, I'm searching for a new one.   If anyone has experienced this or has input I would appreciate it.