I am on Cesamet as well and am in Canada. Are you in treatment at any kind of pain centre? If you're not, I would highly recommend it - it's helps to centralize all your treatments, etc.
The injections might be helpful and you can ask about Botox injections. They're quite expensive and you may have to request your insurer to cover it, but if it works, it's worth it (I paid approx. $465 for one vial, and I've had two injections done so far into the psoas muscle for severe pelvic pain). I assume you're also using heat and you might want to see if a muscle relaxant will help.
Its hard to deal with pain day in and day out...I know. Hang in there, you'll find lots of support here.
Conditions: Fibromyalgia, Chronic Pelvic Pain, Femoralacetabular Impingement (CAM and Pincer), Reynauds, IBS, Interstitial Cystitis, Surgical Adhesions, Ophthalmic Migraines, Severe Hot Flashes (both Surgical Menopause and medication related), plus physically unable to vomit due to the Nissen, and I have extremely tiny veins with a lot of scar tissue...a joy when it comes to having to give blood or get an IV started
Surgeries: Appendix, Uterus, Nissen Fundoplication for GERD, Left Ovary, Gallbladder, Right Ovary, TVT
Medications: Oxycontin, Cesamet, Tramacet, Cymbalta, Flexeril and Clonidine plus Laxaday, Vitamin D and a Multi-Vitamin daily