The hormone blitz can interact with IBS and give you a flare up.
Some people do experience an increase in ovarian cyst activity for a time post EA.

Does it occur at the same time of day, or after the same activity, or after eating?
Is your temperature elevated?
Where are you in your menstrual cycle? (even if you don't bleed anymore, your hormones still cycle)

Jen
48
Novasure 6/9/6
Menopausal as of 10/29/08 image
Post Menopausal as of 05/20/10
Oophorectomy 08/07/2010