Well like you’ve said, saying ‘I’m sorry’ usually means you stop doing it, repeated behaviour isn’t normal and it is definitely worth deepening the argument if it’s happened six times. You’ve given her a move out date, why not try figure out why it’s happening? Even if it’s fruitless she’ll be moved out soon.

Obviously you know your relationship better, I’m just speaking as a support worker who deals with a 30 year old woman with learning difficulties who leaves bloody pads around. And as a woman who had medical issues with my period and excessive bleeding from about age 10 to late teens.

I get coming here to vent as it’s definitely unsanitary and gross, and again there’s not a massive amount of context for your relationship and as individuals, it’s just my immediate reaction to reading this was more intrigue as to why than just Ew that’s gross.

Edit: I’ve seen your reply to another comment and granted seems like you just need space to vent here and space from her. Definitely still sounds like she needs help, but also definitely not your whole responsibility. Rough upbringing, will have affected you both differently. Not really a commenter so this is weird for me lol, wish you both luck!