I did five weeks in rehab and had withdrawal symptoms for about 45 days after that, which gradually tapered off. It's normal.
But talk to your doctor. As someone mentioned above, it could be another medication.
A doctor, preferably a psychiatrist with experience in addiction, should be part of your recovery if at all possible.
Are you home now? I see you're looking for sober living, but I'm surprised that the rehab facility wasn't able to help you arrange that before you left. I have a dog and a house that needed tending, so I went home. Many of the people I was in rehab with who went home relapsed, did another inpatient stint, and are now in sober living. Get there as fast as possible.
Congrats on your sobriety. Please realize that it's probably very fragile at this point, particularly if you are not in some sort of structured environment. Your rehab plan should be as specific as possible. Decide on how many meetings you will attend each week and have a plan for which meetings. Schedules are good.
If a follow-up Intensive Outpatient Program is available, I would strongly suggest you do it. My rehab was 12 Step based, my IOP was cognitive based, referred by my psychiatrist, and also covered by my insurance, it was dual-diagnosis to deal with the underlying bipolar disorder along with the addiction. Rehab had cleared the insurance before I left. I credit this program as being essential to my sobriety, not sure if I could have stayed sober otherwise.
Individual therapy is also an option.
Hopefully your doctor can give you some answers about your continued WD symptoms, as well as help with your ongoing treatment. If possible, it shouldn't end when inpatient ends.
Keep checking in!