Anyone know anything about Ocella?

I was on Ortho Tri Cycle Lo for four months, and in the last month, I was EXTREMELY emotional, with extreme nausea the first two weeks (which had been going on the other months, but not quite as bad, this month, I just coudnt take it anymore!) Yesterday, my doctor switched my prescription. He wrote it for Yasmin, but the pharmacy gave suggested Ocella instead (the generic), as my insurance would only pay for the generic, would not pay for brand name unless medically neccessary. Does anyone know anything about it? If its the exact same thing, I don't mind, but he had put me on Yasmin because of the side effects of the other pill, I just want to make sure I'm not going to get completely different effects from this than I would from Yasmin.