Well, your girlfriend may have an eeeensy, teeensy bit of a point about 'getting yourself together'... Almost every one of us who has exited that cult has had to go through that stage; some of us are still going through the remnants of it.
Hear, hear about the (excess) drinking! Sad to say, that is a common problem with good, upstanding Jehovah's Witnesses as well.... So, please don't hate yourself. That would probably only exacerbate the drinking.....??
First of all, relax. Let me say that again....
REEEEEEE - LLLAAAAAAXX....... Take a few nice, deep, slow breaths....
There is no awful flying finger of fate/Yahweh coming your way... That's just a big scaredy-tale.
I'm awfully fond of saying, "Jehovah and Satan are opposite sides of the same coin. The name of the coin is "CONTROL thru FEAR".
In other words, you've been taught to RE-act to everything. If you are out of the JWs, that's the first, most important step. The next step is to undo as much of the JW "mind control" as you can. For some people, it means finding a therapist - and I would STRONGLY recommend that the first question you ask ANY potential therapist is, "Do you have any experience helping people who have exited a Christian DoomsDay cult??"
If you can't afford a therapist, then remind yourself - you've just exited a Christian (well, JWs are sorta 'Christian'...) DOOMSDAY cult. Get your hands on every book on cult manipulation that you can. Read, read, read. Research on the INternet. Chat/boards are good, too; but keep in mind that, though everyone will be trying to help you, some of the advice will fit your situation, and some won't. A healthy, independently-thinking mind is like a muscle - it'll get stronger the better you feed it (reputable books written by accredited scholars with actual college degrees, and balanced viewpoints by ex-members - the "Crisis of Conscience" is a great one!) and the more you exercise it...
Hope some of this advice helps.... We're here for you in any way we can help! Zid