Hi Calcified
Drinking and smoking to try and deal with trauma never works - it's like an endless loop - you never really deal with the root cause of your trauma, so you have to keep applying anesthetic to numb out the symptoms.
If you want to move forward maybe some counselling is necessary for you to get over your ex and what happened?
I agree with the others as well - drinking to ward off withdrawal never works - look up kindling. You're just building up the campfire with more and more wood for a bigger more vicious blaze down the track.
See your Dr - get a professional opinion regarding your withdrawal - you may be prescribed some help with withdrawal if it's deemed necessary.
D