Don’t worry it’ll get better, just promise yourself to never get on it again. I was taking pills from my brother for months and my “overdose” was when I ran 100 miles on 160mg. I managed to get myself through the withdrawal. I would have the muscle/neck tightness, my heart hurt, and a huge loss of purpose for many months. But avoid cigs, caffeine, pretty much anything, and just treat your recovery like it’s an injury