i'm 19 yrs old and this past month i had a regular period on time but about a week later i started having excruciating cramping to the point that i couldn't do much of anything along with slight vaginal bleeding there were clots about the size of a quarter but the blood was like flakes.... it only lasted a day but severe cramping had lasted about four days the only thing that comes up when i search online is ectopic pregnancy i have had one before about a year ago but it doesn't feel the same..if any one has had this happen to them and know what caused it can you let me know i'm really worried