I used Tegaderm over my F. patches back in my time of using those. It was the only way I could get one to stay put. If yours is not sticking well, that means you are not getting the medication from it properly. My drugstore ordered the Tegaderm for me they were a little pricey so I cut them in half to make them go farther.
You may call the PM office and speak with the nurse and see what she thinks the dr could or would do for you. It never hurts to put the call in who knows they may have something else they can pass on that will help. Worth a try anyway.
Its just rotten to feel this bad any time. Hope you get some relief.