You will find a lot of support here. Make sure you stay well hydrated (Sport drinks or Gatorade will help you balance your electrolytes) and some people swear that ice cream (if you are not diabetic) helps a lot with cravings.
If you start hearing or seeing things or feeling very poorly (sweating profusely, shaking uncontrollably), do not hesitate to call 911. Alcohol withdrawals can be very dangerous.
You might want to look around and make a plan so you can maintain sobriety. Here is a link to a very comprehensive post by Anna which will direct you to different resources etc. http://www.soberrecovery.com/forums/...at-we-did.html
Hang in there, it will get better, the first 3 days are the most difficult physically. After that, it is all about developing a new mindset and not picking up the first drink no matter what.
It also help if you don't see it as "going on the wagon" but instead as making a very healthy permanent lifestyle change.
Congratulations on embarking on a journey which might not be always easy but is definitely interesting and rewarding.