Congrats on your 2 weeks, Nancy. They are quite an accomplishment.
I drank half a 1.75 litre bottle of vodka per day. I am not awake enough to convert that to Standard. Suffice it to say, it was a bunch.
You can't save your brother..... the only person you can save is yourself. And it sounds like you are well on your way.
Re sleep...... it took me about a month to get a sleep cycle down. I, too, drank for sleep. I, too, tried benadryl..... zilch. Tylenol pm..... zilch. Melatonin (supplement)........ zilch. A couple others that I can't remember..... zilch. I had to weather it out and wait. But it was worth it.
Have you thought of AA? Might help, can't hurt