I am waiting for my menstrual cycle to come on. It usually come on at the end or the beginning of the month and 2 days ago I had a small amount of pinkish come out of me and yes I am sexual active. What is happening or what should I do ?

The pink may be implantation bleeding depending when you last had sex. The bleeding would come 6-12 days after intercourse. This could be an early sign of pregnancy.