Yasmin and related experiences

I have been taking Yasmin for 3 weeks now I am into my 4th week. I have taken two white dummy pills already and I have yet to get my period. I wasn't aware that Yasmin takes your period away. Is that a normal side effect of this birth control? I have had breast tenderness since I started taking Yasmin. I started the pill in the first 24 hours of my period and for the first week I thought my period would go away and just come again when I started the white pills at the end of the month but that did not happen. My period lasted 7 days while taking the pink pills in my first week. There was a lot of blood clots during my cycle which I never had before. Has anyone else had this symptom when they first started taking Yasmin? I have a doctors appt on the 29th of this month for a separate condition but I plan to ask the doctor about these symptoms. Has anyone else had any of these related experiences?