I can only imagine the pain and frustration you are going through. I am so happy though that you are doing your best on the road to recovery and are there for your son. No child needs negativity in life and the children of a single/divorced mom get the same love and warmth as a home with 2 parents. You may not see it now but it will and does get better my friend.
Please be careful with your "stress" drinking. I drank most of the time because I was upset or stressed and sadly just relapsed. If anything please see a counselor to help you thru this painful time and dump the booze. It can be such a sneaky beast and give you the impression you can control it.
Huggs and all the best. Keep on your path to recovery.
Kim