Sooooo I did it!
It wasn't nearly as bad as i'd anticipated! The waiting around for a bit beforehand was the worst part because my anxiety was through the roof, but once i sat down and started talking with her it started to go better. I didn't even have to bring up the SI. We were talking about why I wanted to go back on the AD's (which i didn't end up getting a prescription for anyhow - but thats OK) she asked me how i was feeling exactly, and then asked if i ever hurt myself intentionally etc etc, and all i had to do was nod. She then asked me some pretty generic questions, and then we kind of came up with an "intervention" that i can do (especially when i'm home for xmas) when i'm feeling the need to SI. She was really sweet, and gave me some suggested T's that she thinks I might like. I think i might look into that after xmas...
But yeah, thanks for all your support and encouragement. I'm just glad that i got it over with, and hopefully i can move forward from here!