I just started taking Yasmin on July 9, and I havent had any problems with it yet. I just noticed yesterday and the other day more CM, however today is rather dry. I always here other women getting sick to their stomachs but I haven't yet, I guess I'm lucky or it will get to me one day.
Often the first week of a pill pack is the worst, nausea-wise. Mostly b/c on the inert week, your body gets used to not having the extra hormone on board.
Call your doctors office and describe what's going on. They could put you on a different type, or one with a constant level of hormone like Seasonale or something.
Think about switching pills. Maybe a no period pill (- video info here - would have more even hormone dosing that wouldent mess with you so much. - Kate from the womens health desk at
Maybe try taking the pill at a different time of day. I take mine at 7pm everyday.