I can't afford my yasmin pills anymore...what generic ones could i use?

I can't afford my yasmin pills anymore since my mom is getting a divorce and phil took us off the insurance. I NEED these pills, or else I'll end up in the E.R. again. I need the hormonal balance they give. I know wal-mart does generic prescriptions now, and I would like to know if any of you know of a generic pill that wal-mart offers for cheaper?