Well she has good reason at least...
Because I gave her a glycerin suppository. She's been constipated a few days and the olive oil treatment hasn't made a dent, neither did the Vaseline.
Hopefully this does the trick. She's never been diagnosed with megacolon, but I did have a cat that did have it and she's experiencing similar symptoms.
If she doesn't pop today, she's going to the VET tomorrow.