I have always had irregular periods. The timing is always random. I started birth control and I ve been on it for two months. I am 18. I am supposed to be having my period, and I m on it. The first day, the blood was brownish, which is nothing new. Usually it turns red and flows regularly. The second day, the blood was brownish/pink and was almostlike spotting. The third day it was the same but even less flow. The fourth day is gray. It is still very light. It is almost like tissue and clots. This has never happened to me before. Is this something to worry about?