This colleague is young and in charge of the stationary supplies in place of work. I would say I’m her senior rather than other way around - this is just for context.
She’s been quite short tempered with me quite a few times. Yesterday for example I went to take a laminator and just said I might buy one for home too as they’re useful for kids stuff and she just snapped telling me that’s not anything to do with her and it’s my business not hers! I didn’t say anything as I was a little shocked at how she spoke to me. I’ve woken up angry (I do this a lot I don’t say anything in the moment but it festers over time).
What shall I do: email her now and just say stop being so ill tempered with me or wait till Monday and send email? I’m part time so I won’t be back in work till middle of next week and I won’t be so angry then and will let it go as usual