Hi slave..
Painful ovulation, aka Mittelschmerz syndrome. Something I am very familiar with personally. It occurs when the ovary releases the egg during ovulation, and the ovary remains open just enough for fluid to accumulate, causing pain. This can be quite intense, I know. Oral contraception may help, since birth control pills prevent ovulation. Your choice. I have also found that exercise helps.
My cycle is like clockwork, usually 9-11 days in, so I can prepare with Advil.
Menstrual cramps that are severe can be many things, including endometriosis. We are very complicated creatures, aren't we? I do not believe either of these are menopause related, but I could be wrong.
Hope this helps, sweetie!
:-)