Hi, welcome. You are right on track w/ still feeling like sh--. It's takes weeks to even begin to feel physically "normal." Look up the Thomas Recipe and follow what it says. It will help a bit. So will getting your endorphins up: exercise even if you can only walk to the mailbox. Force yourself.
The MOST important thing you can do is to get into aftercare. Once we put down the drugs, then we're just addicts w/o the drugs. I cannot even tell you how I tried to get on with my life and feel fine w/o any help once I quit opiates. Only to go right back because the depression, confusion, and inability to deal was too much. Most of us do NA/AA. It'ts been the only thing that has kept me clean and also sane. I have 4 years and 3 months clean.
Check in and let us know how you're doing (that will help you, too!) Hang in there.