It is true that benzos are some of the hardest drugs to withdraw from (physiologically--it can be very dangerous even). I see that you are taking klonapin for anxiety so it's understandable that you'd be concerned about
the possibility that it's causing you pain. Personally I find that it isn't good for my cognition but it helps me sleep and keeps my anxiety down. Of course, as with most medications, headache is a potential side effect but it's not all that common--in my experience.
How have the headaches changed since you started reducing your dose? If they're getting worse withdrawal could certainly be a problem; if they're getting better then it's probably a good sign that reducing your dose is a good idea; and if they're the same then it could be that the clonazepam is just hanging around in your system (as it does for a long time) or it might mean that it really isn't the cause. Either way keep close tabs on your reaction to the dose change. Hopefully you'll start to feel better, and there are certainly other ways to manage anxiety. But if you don't of course it's very possible that the headaches are the result of any number of other causes. Also, treating anxiety can certainly help manage headaches. Again, keeping a close eye on the changes should help you figure out what the best course of action is. And make sure that any dose changes are made very slowly because the body is very sensitive to benzodiazepam changes even if you don't feel the results directly (their action is often called invisible).
If you don't mind sharing what dose are you on and how are you reducing it?
DX: NDPH, Recovered(?) CRPS
RX: Lamictal, Namenda, Wellbutrin XL, Oxycodone, Oxycontin, Concerta (Methylphenidate), Clonazepam, Rozerem, Magnesium (1200 mg/d), Riboflavin (400 mg/d).
PRN: Ketamine nasal spray
, Toradol IM, Celebrex, Haloperidol, Lodine, Zofran, Phenergan, Ambien CR
rarely: Migranal, Thorazine, DHE IM, Droperidol IM, Reglan, Provigil, triptans (Imitrex, Maxalt, Relpax, Zomig, Axert, Amerge)I can be contacted personally via email at korbnep:firstname.lastname@example.org.