Dear Practo User ,
The information provided by you is not sufficient,
Kindly provide details I.e,
How long this pattern has been persisting?
How much is the amount of bleeding?
Any other symptoms??
Any investigation done till now ? If yes kindly attach the detail
You need a full thorough check up for the kind of problem you are describing , so visit to a Gynaecologist is must.
Health Tips
keep a menstrual diary , will help determining your fertile period also