Good morning, 3suns1star!
And welcome to SR!!!
No one here can diagnose you with anything. We are not doctors.
But, it's clear that your drinking and use of pot are causing problems in your life. Alcohol is a depressant. So, becomming depressed is not unusual when you abuse that substance.
You say your doctor told you that you suffer from depression brought about by substance abuse. Are you on medication? If so, drinking will negate the benefits of that medication. It will be like taking nothing. And, if you continue to drink, you will continue to be depressed, and get worse.
Nothing changes if nothing changes!
Have you tried an AA meeting or any other form of recovery? It seems like that would be a good first step for you, (pardon the pun!

) And you can get some really good online support here on the alcoholism forums, too.
I urge you to seek support for your alcoholism problem. The other problems will only get better once you begin to clear up that one. Remember, if alcohol is *causing* a problem in your life, then alcohol *is* a problem in your life!
I wish you well as we both grow in our recovery.
Shalom!