Narcotic medications such as oxycodone are not prescribed for insomnia and very frequently cause central sleep apnea which will make your sleep worse. Since it's also not working for your insomnia and you have no pain, you should stop the narcotic medications.
A Harvard study in 2004 demonstrated medications are not the best treatment for insomnia, but rather Cognitive Behavioral Therapy for Insomnia (CBTi) is better. CBTi is safe in the long term, is less expensive, has no side effects, and treats insomnia at the root cause instead of just trying to "knock someone out" like medications do. If you go see a sleep doctor in person, CBTi is what they will recommend. Alternatively, online programs have been found to be equally effective and less expensive.
Rest well!
Hello and hope you are doing well.
You have stopped your pain medications, which is good and you are receiving sleep aids to help you sleep. You should stop becoming anxious about sleep as this becomes a vicious cycle and you may face problems falling asleep. Follow good sleep hygiene measures like going to bed at the same time, waking up at the same time, avoidance of alcohol, smoking and caffeinated beverages. Maintain warm, comfortable bedroom environment and engage in relaxing activities like a warm bath before bed time.
Hope this helped and do keep us posted.