If 3-4 inches blood clotts come out of you what douse it mean?

loads of blood clots came out of me. about 3 big ones and a few little ones and medium ones.. yes on that month I had unprotected sex 3 times 4th 12th and 14th.. and yes he came in me. But on the 21st this happend to me with spotting of big liquid drops on my panties! then heavy blood with loads of blood clots :/ thank you..