(((gazwsxedc))) - Welcome to SR!!
though I can't give medical advice, here, I can tell you that, yes, several vitamins become deleted with excess use of alcohol. Did you tell your dr. how much you drink? If you didn't, I'd go back and tell him. They can do simple blood work to see if anything is out of whack.
This is a great place for support if you want to quit drinking. I'm an RA (recovering addict) and have some serious sleep issues (as do some other friends, here) but if you continue to drink, you are going to end up with some serious consequences.
Best to quit and avoid all that.
Hugs and prayers,
Amy