When I came off oxy & hydro it took my mind some time to heal. Depression, anxiety, and insomnia were lingering issues for at least 2 months. Give your brain chemistry some time to rebound to where it was before you started using. If you were using a long time, it may be a while. Or relief might be around the corner.
Just focus on taking care of yourself. Go for walks. Eat small meals. Take long, pointless drives with good music. In the evenings find relaxing games to play on the computer. Watch a bunch of stuff on Netflix. Just some ideas. I know early on it feels like time just crawls along. It will get better, I promise.