Not much to offer you in the meantime except ice on the head pain.
If you take any OTC or pain reliever 3 times a week or more, you are likely suffering from rebound headaches.
You mention you have tried Topomax. If you have been on that long enough to determine whether it is going to work, ask the doctor who prescribed that one to prescribe another daily preventative migraine medicine for you to try until you can see a neurologist.
If none of the daily preventative medicines work, then the neurologist can offer you other treatments such as Botox, nerve block injections, trigger point injections, accupuncture, physical therapy, etc.
Sorry you are suffering so much. Hopefully you can get more help soon.
Sara
I also had Thyroidectomy in March 12. I was Hyper and now Hypo but test came back ok. I also have had a full hysterectomy.