Welcome Laura!
I (and pretty much everyone else here) drank the same way..... once we started drinking, it was hard to predict where we'd end up or how much we'd drink. I could only stop after one or two when there was social pressure.
I'm glad you're here and talking about it - it's not an easy thing to do. I wasn't sure I'd be able to get sober either (scared - oh yeah), but with the support here I finally took the plunge and am so glad I did.
We're here for you!