Hi..i Took Regestrone Pills 3 Days As Prescribed By The

Hi..i took regestrone pills 3 days as prescribed by the doctor and just after the 2 days of stopping the medicine I started bleeding..but this time the bleeding isnt normal..i am not having much flow.. Infact there is no flow.. i am having red and white discharge together..normally I have heavy flow for 5 days..but this time it is not so..i am in stress due to my exams starting this week..does this mean I am in periods?