I think British women use "fanny" to mean vagina, and American women use it to mean "bottom" (that is, bum to the British). :)
Did this thing come out of your fanny or your vagina. Or when you say fanny do you mean vagina?!? If it came out of your vagina it could of been a blood clot as these are normal. But if it came out of your fanny meaning your rear then i suggest you going to the ob/gyn and ask is this normal because I dont think it is.