I'm sorry to hear this happened to you. It sounds really hard.

Here's how I see it: Contacting a professional, in their professional capacity, is not weird or stalkerish at all. If you found out where she lived and went to her house and rang her doorbell - that would be a different matter, but this is about her job, and she's got to have clients. It is weird that she didn't mention the possibility of you continuing with her, but there are lots of possible reasons for that. Perhaps her fees are much higher now and so she didn't want to put you in a position which might be financially difficult for you. Perhaps she has to take over clients at the practice where she works now and has a full schedule. Perhaps it's just a principle thing, that you have to ask outright, because she feels that she is not supposed to suggest it. Perhaps something different altogether.

But in any case I don't think there is anything wrong with your asking for an appointment, even if it's just a closure session. She is in her right to deny clients, but from what you write here there's no reason to think that she would, unless her schedule is truly completely full.