Hi Goddess,
I used to take tramadol and dihydrocodeine (DHC) for a back problem but soon discovered that if I took enough of them they would give me a speed-like buzz. Thing is, because they are opioids you build up a tolerance very quickly so need to take more and more for the same effect. I didn't want to keep going back to my doctor for more (how would I explain the high usage?) so I eventually told myself to stop taking them. For some reason I found it easy to stop them, which makes me wonder why can't I stop all my other addictions
There are other painkillers that aren't opiates. You don't need to tell your doctor why but you could say they aren't working so well anymore and see if he can prescribe you something else. Also, have you looked into PMPs (pain management programmes)? It might take some time to find a technique that works but there are quite a few options out there that could work without drugs. Obviously, don't stop taking any prescribed meds without speaking to your GP first.
Hope that helps a bit. xx