In the short term, please avoid
alcohol. Given your experiences, adding
alcohol to the mix sounds deadly to me. That likely won't have to be a lifelong avoidance, but alcohol will certainly worsen any lows you get, and they sound very bad already.
I am not a physician, but from what I've learned about hypoglycemia, it is very important to include protein (tho' that protein can surely come from plants) in your diet.