HELP! Not sure what category to put this one in..

So, I've been posting alot, I honestly just don't know what to do.. I just feel different.

I've been on provera 20-30th of september. It's been 6 days, no AF, really bad cramping for 7 days, nausea for 4 days (nausea just keeps getting worse while cramps lighten up) I understand the whole "wait around 10 days, and AF should come) but, is it possible to get pregnant on Provera? I did have AF in august (5-8) but I took a test the 19th of september and it was negative.. I think I'll re test tomorrow morning but I'm really not getting my hopes up right now.. does provera cause really bad nausea (certain smells, way food looks, anything really) even though I'm off of it now?