First, good show on admitting to yourself that it's time to make a change.
I see you have MS in the mix so you might consider a chat with your doctor. Sure, lots of folks go cold turkey and get through with no bad effects. Then there are those whose BP shoots sky-high, or get seizures. So the prudent move here may well be to do this with medical supervision.
As to doing it alone before going to an AA meeting, your call. Your chances of making a lasting change go up with some kind of recovery plan and support base. Hey, I did the same thing when I sobered up. I wanted to try it on my own (didn't know the medical dangers) and I lasted a day before I hauled ***** to a meeting.
Heck, I checked into treatment when I'd been sober for ten weeks.
Start with your doc? Why take a chance...you already have the MS to contend with and some medical input could smooth the way and prevent a flare, or worse.
Keep us posted. We care. I care.
Jeff