I Have Been Having A Period For 3 Weeks. I'm 27, Have A 1 Year Old, And Never Had This Problem Before. Its Been A Very Light, Spotty Period. I Was 3 Weeks Late To Begin With?

I have been having my period for three weeks the first two weeks were light and there was one day where I had a lot of blood clots..The past two days its been heavy wit some clots what should I do to get rid of my period?