Started yasmin (drospirenone &ethinylestradiol) first day of previous period.7 free days started 2days ago,now spotting.according to my cycle,period should come in 8days. expected period date will change? is spotting now ok?

We want to believe that our body’s clock will match our imagination and expectations of exact 28 or 30 days. Hypothalamus pituitary ovarian and uterine axis runs independently of consciousness. If you are on birth control and not waiting for pregnancy then do not worry for date + ~5 days. Start it back on time. Hope it helps.

No, it is not ok. Most likely it is due to your hormone therapy. But it is not for sure. You have to rule out other causes (especially organic ones such as myoma and polyposis). If you do your ultrasound, it will most likely cover everything.