For me, it took a few days in the ICU to be able to walk again, as I was completely depleted (I had stopped eating for days before I was admitted; my only intake was vodka). They sent down a physical therapist to get me walking slowly around the hospital. It took about a week for that shakiness while walking to go away.
The focus for you now should be next steps. The best thing I ever did for myself was to go straight from the hospital to an inpatient rehab facility. I haven't touched a drink or drug since. The hospital had a social worker who helped me get a bed.
This can be your turning point towards a better life.