Hang in there Nick.
I too am not experienced with opiates but I think some pieces of any addiction have some common challenges. I know alcohol withdrawal can be dangerous and I think Itchy has it right to see a Dr and let them know what's going on. I have no idea if they can help ease withdrawal or not.
I think there is a PAWS with most addiction withdrawal so feeling off might last a while.
I think of normal now as a setting on a washing machine and not so much applicable to people. I prefer to look for my own balance which may not be what someone else views as balanced at all but if I am at peace , then its all good. But thats me
Best wishes