Hi, I ve been on Qlaira since February, (started on the first day of my period then), and ever since then, instead of bleeding, I ve just had a dark brown discharge every month. A month ago, I missed a pill on the 18th day, and in the instructions it said that if I miss that pill, i should instead take the first pill from the next pack. After that, I didn t have my period but only a bit of brown discharge for about 2 days (this happened a few weeks ago). Is this common ?