Depo an bleeding

Amanda
I received the depo shot on may 6th the same day i had my iud of 12yrs removed...my period was supposed to have come on the 9th of may but never did an then on the 30th of may i started spotting brownish color for 5 days then i passed a flesh color clot an the spotting turned to a pink redish color an has been going on now for 6 days what could this be?