To be tearing my hair out with colleague?

[BlueCheesePlease]

Normally very on the ball but in the past few days...
Didn't seem to understand a very basic instruction (Think- Please go and get the paperwork from the office but she came back with a few pens) then today's incident. I asked when she could work next week. She gave me three days. Then kept deleting them and giving me a different set of days. Then saying she could adapt things so she could work the week then deciding she couldn't. This was done over text as she was at a hospital appointment at the time but my god it's like pulling teeth.
Aibu to feel like tearing my hair out?!

Surely this is a reverse?

Normally very on the ball but in the past few days...

Has it really not occurred to you that she is going through something right now, perhaps something quite serious and stressful? You are not coming off here well at all, and you clearly have the empathy of a rock. Fucking hell.

@BlueCheesePlease I didn't mean to imply I thought your colleague was young. Just that, attitudes like yours are being dealt with differently by the younger generation.

I understand it was a hectic time for you and it sounds like you're covering a lot at work, but that is not trumped by your colleague's hospital appointment. You still need to learn to respect her boundaries and not expect a reply when she's at work, unless she's actually 'on call' and being paid accordingly. All the more so because she was at a hospital appointment.
There is more to life than work.