Only you and everyone I know in therapy has done this! It's only natural to want to know things about your therapist to make her more real to you. Everyone googles everyone these days. I saw a cartoon about a guy in a bar who tries to pick up a girl. The bartender says to the guy, "She wanted me to tell you that she thanks you for your interest. She is going to go home and google you and then let you know." It's very common and I don't think it's stalking or anything like that. Have you read "In Session"? That book normalized a lot of behavior in therapy that I had previously thought of as shameful and one was people driving by their therapists' homes.

I don't know what kind of relationship you have with her, but the best way to alleviate all the tension and anxiety you feel is to tell her. (You probably didn't want to hear that.) I'm sure she'll understand. You sound like such a sweetie.

If she wanted to remain anonymous, she wouldn't have her address out in public or would be unlisted. I'm sorry for your distress.