I took the depo shot a little over a year ago once. A few months after i got off that shot i passed a clot the size of a quarter and they found out i had polycystic overies because i was bleeding constantly. This past January i passed another clot that size. January 31st- February 7th i had a period. February 17th- February 23rd i had a period. Now i am spotting and cramping and these are one week intervals.