I had a misunderstanding with my doctor which led me to take Deviry tablets along with Diane 35. I took the combination of Deviry & Diane 35 for 3 days. I took Deviry alone for another 3 days. After 10 days I got my periods. I started taking Diane tablets from the 2nd day for 18 days. Now my packet of tablets has finished. Today is my 19th day. Due to unavailability of tablets, I had to buy Krimson 35. Can I take Krimson 35 for the last 3 days of my 21 day cycle? Please let me know soon.