Navy blue sheets and the heavy duty cycle in the washer with cold water.

Don't have uterus or ovaries anymore but I always used heavy duty tampons along with the longest most heavy duty pads and overnight was still a problem.

Easy to say this 24 years after beating ovarian cancer, but I'm entirely serious when I say that cancer surgery and four months of chemo was a fair trade for also getting rid of the endometriosis massively festooning my insides.