I notice the same thing

Pms hun. Hormones change and fluctuate throughout the month. Mine was always bad then too. Exercise, going for walks, something to bring up your endorphins which releases more feel good chemicals in your brain

Hormones are such a tough thing when you already deal with mental illness. Something that helps me is easing the physical discomfort that also comes around that time, when I’m uncomfortable mentally AND physically it seems to have a compounding effect. Letting myself rest, using heat and pain meds for cramps, eating according to my cravings all make it a little more bearable