well...a few months ago, i forgot.. but somewat November of last year,, i thought i was pregnant.. i wasnt sure... this one morning.. i had this most hurtful pain ever... & i was bleeding, i think its period. im not sure if it is.. but it was my first time feeling that pain... i couldnt stand up. i was crying... really bad cramps , bad backpain... did i have a miscarriage?
also, cramping, back pain.. all symptoms of a period as well as a miscarriage. just like some women have simple painless periods, some women have awful periods where they can not stand to get out of bed. same with miscarriage, some women will tell you they felt little to no pain and for other people it was unbearable.
unfortunately, since you did not have a positive pregnancy there really simply is no way to tell. were you passing blood clots or notice anything that looked like tissue or a sac? if not, it was probably just your period.