I agree with everything everyone else said, slow down. But in the back of your mind, keep things in perspective. She's young, has a lot to learn. Training, in general, will be great for her. She'll need lots of socialization and if she continues to be reactive to other dogs/people, it's something you need to nip in the bud fast! As in, address it now, not later.
I eventually quit agility because my dog was too reactive and too aggressive at agility trials. I knew one day I would probably get kicked out or worse, have someone sue me. As with Ashley's (corbinam) dog, Koji would work in the ring and couldn't care less about anything else. But outside, you could see he was uncomfortable, stressed out, etc. Spending the day at a trial became more of a hassle than the few runs of fun. I regret not addressing it when it started.
So, train in obedience, train in agility. If you see that this isn't passing (as you stated, maybe it's the fear stage), then start working on her reactivity to things. It may never go away, but you can train to make it easier for her and you.
Good luck!