I have been on Yaz for 9 days. About a year ago I was on Yasmin a...

I have been on Yaz for 9 days. About a year ago I was on Yasmin and didn't notice any significant changes. In the past year, I haven't been taking BC - but my bf and I decided to try this method of contraceptive. My periods were always fairly short (4 to 5 days) and spaced about 30 to 35 days apart. I also NEVER had cramps or any other symptoms during my period. Well, it's my 9th day on Yaz. My period still has not ended. I have never had my period for this long! Also, for the past 2 to 3 days, I have been experiencing INCREDIBLE cramps. I had to lie down last night I was in so much pain. I am also experiencing mild nausea and horrible dirrhea. I've also gone up a cup size and my breasts are very sore and sensitive. My appetite is horrendous - I feel ravenous! I haven't had the courage to step on a scale, but I am sure that weight gain has occured. Has anyone else experienced longer periods?? I can't decide whether to stop taking Yaz or wait a month or two to see if the symptoms will clear.