i kinda had somehing similar happen, and i have no clue what to think about it but, i got a really short period, and then a week or so later got some weird coloured spotting, then for 10 (TEN AHH) days i got heavy, clotted bleeding, with super bad back pain and cramping. i got a pregnancy test and it was negative, so om afraid i cant offer to much help, i was worried about miscarrying, like having thin lining in my uteris or something i unno, im glad some one had smething similar atleast. i would get an ultrasound and a pregnancy test.( request the blood test, it shows up better than the urine) hopefully you get better :) and everythings ok
It could have just been a "normal" period becuase your symptoms CAN change as you get older. But it could also have been an early m/c. Many Many women m/c and have no idea they were ever pregnant because it happens so early on. I don't mean to be the voice of doom and gloom but those are the possibilities I can think of.