I Have Cronic Pain Issues And Have Been Taking Hydrocoine/acetaphetamine

I have cronic pain issues and have been taking hydrocoine/acetaphetamine for many years,i recently broke my knee and the meds I was taking was not cutting it.so my doctor prescribed me oxycodone/acetaphetam my question is will the oxycodone make me feel exhausted all the time like I feel I have no energy to even move as before with hydrocodone I never had this no energy feeling before,but I also have gastrole intestine problems that have recently flared up so I don't know if it is the swich of pain meds that has left me with lack of energy or my stomache problems? I have an appointment for my stomache problems .but am just looking for some thoughts on my very low energy problem. thank you for any advice.