There's also the "WTF stress" that would go with being off cycle anyway, before even any of the other effects that would naturally happen. While not quite to the same level, if you've known anyone that was between the Test and Result time period for a cancer diagnosis, it does some weird things to people.While it is true, the stuff with ollie is clearly stress related since she worded her first post in a 'jokey-ish' like way of doing it. She's already having her own mental baggage, and then one of her most notable zomrade left the world, causing more mental damage to her already stressed head.
She just want to joke about it, that's pretty much is.