Hi, This morning I woke up feeling fine, but within about one minute of walking around I was overcome with very sudden, very severe and painful period cramping and nausea- to the point that I vomited from it. (Something I rarely do). I thought I was starting my period but 4 hours later I have not started bleeding.

This has never happened to me before; my periods are very regular, my pain is usually present but tolerable - I have never missed work because of it, but had to today - I couldn't even stand up!!

Now I feel 80% better (thank goodness) but the episode scared me and I'm wondering what could have caused it. Any thoughts? Thanks!