Yeah the withdrawals are nasty. The anxiety, trembling, racing heart always led me back to another drink. The first few times I "quit" I landed in the ER a few times because I was in such a panic and confusion. However, after pure willpower, I stayed sober for about a week and it got better day by day. It sucked. Then I went back to "moderating", which didn't work, being an alcoholic.
For me, I finally ended up seeing a physician and was given short acting meds for withdrawal under medical supervision. and some anti-depressants.
I've finally balanced out and have been going to AA and working the steps, and committed to sobriety once and for all.
You can do it with or without meds-see a doctor if you really have any pressing problems.