Yaz is the first birth control pill I've ever been on. I'm 21 and...

Yaz is the first birth control pill I've ever been on. I'm 21 and have not needed a birth control regimen until recently. It is my 7th day taking it. I was ordered to start Yaz on the first day of my period, which I did. My periods have always been 2-3 days long, mildly heavy with no cramps. Since starting Yaz, I am STILL on my period and am nauseous every single day. Everyone keeps telling me it's just because my body is not used to birth control, to wait it out, blah blah blah. But this is complete crap. Why am I gonna pay a co-pay every month to bleed longer and be nauseous every single day? Do any of you ladies think this is my body reacting normally to a new substance?