What Causes Muscle Spasms And Headaches While On Compazine And Benadryl?

I had to go to the ER Tuesday night for an Occipital Neuralgia headache. Brief background; I have had these for five years and haven t really gotten much relief from them. I ve had ganglion blocks and an Occipital Ablation. My GP/Internist treats it as best we can to give me somewhat of a normal life. When I got to the ER the Dr. there treated me with Compazine and Benedryl. I haven t slept for days, I ve had abnormal muscle movements and spasms that have caused further headaches, my neck muscles are so sore I can t touch them and they are causing the Occipital regions greater pain. Is this something that could have been caused by the Compazine? I have never had this drug before and have a tendency toward the less likely side effects of a medication. How long does it take for this to get out of my body, it was administered by IV and I have no idea how much. I do know that the Benedryl was 50mg, the side effects from that were bad enough as I could not keep my legs still no matter what I did. I am at that ER once a month at least as sometimes these are uncontrollable at home, every Dr there gives me