1000mg of diphenhydramine is an insanely high dose and you require professional medical attention NOW because you could, and most likely will have serious complications and there is a risk of death or brain/organ damage. 10 shots of alcohol is enough by itself to make most people sick and seriously hating themselves the next morning.
I seriously hope the OP went to the ER (or better yet, had somebody take him to the ER) and got the help he needed.