The bf’s fucked me only in the ass this whole week and he’s just put a butt plug in, which I’m not allowed to touch until Monday. My ass hurts so so much it’s burning

“It is widely accepted as a basic guideline that you should not keep a butt plug in for more than 2-3 hours at a time, even if it feels comfortable. The walls of your rectum, and especially the area in and around your sphincter, are prone to having decreased blood flow when pressure is applied for long periods of time. This may lead to damage to your rectum and even cause ulcers.“

- https://loveplugs.co/pages/how-long-can-you-keep-it-in

Kink and hard play require hard research. Please, in the future do your research and then have fun.