Hi Kkccoo,
I am in a similar situation right now. I went in for a pap (I'm 27, 2 adoptive children, no biological children of my own) and after the pelvic, ultra sound and transvaginal, confirmed I have a cantaloupe sized mass on/around my ovaries as well. Aside from being more tired than usual, and a little forgetful, I've had no side-effects of it as well. From what I've read, however, these things can creep so slowly that you don't even realize you are sick and/or changing.