I have been taking Yaz for 4 months.
The first 2 months my breasts were extremely painful. They were huge and I felt bloated. Also, I have had acne for years, mostly on the neck/jawline. The first 2 months on Yaz I broke out in new and different spots, i.e. on my cheeks like I never had before.
Sometime during the 3rd pack/month, my breasts suddenly stopped hurting and my skin became amazing. I always heard the give-it-3-months rule, and for me, that was very true!
If you're truly miserable, speak to your doctor about switching now. But in my experience, I definitely think you should stick it out for 3 months before making any decisions.
Also, I don't start my period until the 2nd or 3rd day on the white/inactive pills. And my period usually continues 1-2 days into the pink/active pills of the new pack. This is normal.