Your body has probably built up a tolerance. It happens after you have been on a medication for a long period of time. You will need to let your dr know so that he can make adjustments to your medication. Hope you get to feeling better soon.
Ginger
I'm surprised it took this long for you to build up a tolerance to your medication! Consider yourself lucky in that regard. Don't worry too much, it's happened to me, and continues to to this day. I was on the patch also, and when I became tolerant,the dosage was rasied (in your case a 150mcg. patch should do it). When the dosage gets to high, a switch to a different opiod is warranted, and around you go!!! Good luck.