I'm so sorry things have been so hard recently. I know it would be hard/upsetting to have your T follow you to the bathroom (and I'd have a hard time going too if someone were there listening) but I think she simply wanted to ensure you were remaining safe and I think she cares about you, too.
I'm very very sorry you saw that guy, too......it's no wonder you are feeling hurt and sad and in need of support. It's OK to ask for support; I know it feels more comfortable to give it than ask for it (I feel better giving than asking too!) but when you need it, you need it, and it's OK to ask. We are here for you, too!