Painful or difficult menstruation is known as

Dysmenorrhea

Explanation:

Dysmenorrhea is the medical term it is like the difficult or painful menstuation or *period.  There are two types of dysmenorrhea; primary and secondary. Primary dysmenorrhea is the most common kind of dysmenorrhea. :)

answer:

its probable on the floor if it fell off.

probably since the potency of the cocaine, not a lot, but i've never done any research on cocaine so i wouldn't know, but i would also guess it would determine on the gap between sniffs or if you did it all at once, so i really don't know.