Hi. Thanks for asking in Healthcare Magic. Krimson contains Ethinyl Estradiol, an estrogen and Cyproterone acetate, an anti androgen. It is given for persons with PCOS having high androgen level. It not only regularizes the period but also prevents the conception by inhibiting the ovulation and making the cycles anovulatory. Hence there is no need for another contraceptive method while you are on Krimson and the morning after pill you took is totally unnecessary. Also the hormones in the pill (high dose of progesterone) will interfere with the onset of your next cycle that has been regularized by Krimson. Since you have already taken the pill and the withdrawal bleeding is imminent you can stop Krimson and follow other methods of contraception like condom (to be on the safer side) but not hormone pills till you get the withdrawal bleeding. You can start the fresh pack of Krimson when you get the period (withdrawal bleeding) following the pill. I hope this is useful to you.