OP < i'm going to be quite tough with you here.
This post, if it's anything like you behave at work, is sending up huge red flags for me.
So - 1-1 meetings that haven't been scehduled. Annoying, I understand. Why don't you be proactive and ask for one and schedule it?
Maybe it's just me being a PITA.
Probably I need to stop asking her anything and try and ask someone else. Though as others say it's probably all my fault anyway
These are all very classic "I'm the victim, even though I've done nothing to try solve the problem" statements and can be extraordinarily frustrating to deal with. Try turning it around:
"I think maybe I'v ebeen frustrating her. I'm going to ask a colleague for their help on this specific issue / ask a colleague for advice on how best to approach my manager and take ownership of the challenge."
I haven't asked anything since Friday anyway just keeping my head down. Am scared that she will say why haven't you done xyz though. and if I say I don't know she will say well you should have asked questions in the chat if you don't know.
which you should have. Or perhaps you should have known the answers. I don't know, what about in that 1-1 asking her if the questions you're asking are the problem and if she has preferences on how/when you do ask?