If you are taking the pill, and you are horrible at being consistant with your pills and even miss pills frequently, what are the chances you can get pregnant?

Ok, i have always wondered this???

I am currently taking tri-cyclen (21) . And according to my research this pill does not let your ovaries produce eggs at all. correct??? So if this is true, if i miss pills frequently before my ovulation time, does this mean my ovaries will decide to release an egg, therefore increasing my chances of getting pregnant on the pill?? I have always wondered this, as i am having some frequent urination and bloating, and I have not drank any water today, but continue to pee (in large quantity's). Please help!!!!! Thanks!!!