So you don't known that you are/were/ may be pregnant?
no not for sure. but my periods are always abrupt and heavy, extremely painful cramps....i have never had light spotting and light cramping before a period.
If you had "tissue" you'd have been far enough along to still be getting positive HPTs even if you were in the process of miscarrying.
I've had losses at 4, 6, 9, 12, 15, and 23 weeks. Pretty much every state of the game as far as what your body goes through.