i've been having the same symptoms. i thought i was pg, no test, but lotsa symptoms. just gave birth to dd2 6 months ago, not on any birth control, but bf-ing.
then i started bleeding last week. also, longer and heavier than usual, and a lot of cramping, really intense cramping like i don't get with a period.
is there a way to know for certainty whether it was a mc or period?