I have been on Yasmin for a little less then a month. Since I've ...

I have been on Yasmin for a little less then a month. Since I've been on it, my husband and I haven't had sex, not once...we tried once, but it hurt me after about five minutes because, well, I guess I wasn't "ready" anymore. I'm only 20 and I had a pretty good sex life before Yasmin. Is this a side effect of Yasmin or could it be from other things going on? I don't lead a very stressful life and nothing's changed in my lifestyle besides Yasmin.