Good to hear, ST.
When I saw your avatar I thought of someone here who said that addiction is like a lion in a cage, you can't let it out a little bit at a time.
Your GF's issues are her inner problem, you didn't cause her to have a breakdown, she has to learn to control her own emotions and her own life experience. That seems a bit over the top to have, "almost fainted and had to go to the doctor," because you had some drinks. Please don't take on the guilt of that - she needs to be able to calm herself. Let her work through it without you trying to "fix" it. We are each responsible for our own actions and reactions to the world. The less drama over this whole thing, the better for everyone.
Just keep going! You know what to do, and now you've experienced that and don't need to do it again. Don't beat yourself up!