withdrawal can be very dangerous especially of you have been drinking heavily for an extended time and just stop. Seizures can damage you even further.
I did quit cold, but i do not think my amount of consumption was as high as others. i was very uncomfortable for 3-5 days, (but sick from another flu at the time too).
I do not practice AA so i can't comment on the meetings. but you feel UNWELL, you need a supervised medical detox for your own safety and health.
welcome to sr and congrats on stopping.