I hope by now you've found some relief.
What you have described sounds like ON to me. I have had ON off and on for over 5 years now. The first time the pain lasted for over 30 days with absolutely no relief. I thought I was going to go crazy.
I have tried the amitriptilyne and gabapentin. I found neither of those to be very effective. Honestly what works best for me is good old Ibuprofen 800 mg. Also ice packs. Both of those help reduce the inflammation. I also have gotten several Occipital Nerve injections. These sound worse then they are and the relief is worth it for me anyway.
Good luck, I hope you've found something that works for you!