I was on ortho tricyclene for over a year, after having problems with the depo shot and other birth control pills. I thought otc was brilliant - the duration of my periods went from 5 days to maybe 2, I didn't have as many mood problems either, once my body was able to adjust to it.
However, I did start to have gastrointenstinal cramping that the dr. shrugged off as a side effect. That cramping lead to bleeding from an orrifice that just shouldn't bleed, and I ended up in the hospital ER with an ischemic colitis, which can be fatal if not treated immediately. It turned out the "tricyclene" has a property that can exhaserbate any pre-existing gastrointestinal disorders within a small amount of people (I'm told it's 1 in 1000 have this type of reaction while on ortho tricyclene). It was a fluke that this happened to me, but I wish I had been a bit more persistant with my dr beforehand.
I am very happy to read that you have found a wonderful doctor, and it's great that you are bringing up these concerns. I would most definitely talk with them and be as detailed as possible.
Best wishes

Rachel