Welcome!
Your feelings of panic, anxiety and fear are what happened to me in my binge drinking days and I still remember how miserable it was. My heart would be pounding, sleep would be impossible, just awful.
You will be able to do this and yes, it will be hard. But, it will be worth it.
Do you have a plan in mind for stopping drinking and staying sober. Following is a list of ideas and recovery programs we have used:
http://www.soberrecovery.com/forums/...at-we-did.html