Provera

I did 7 days of provera so I can do my first round of Clomid. I have taken provera multiple times and I usually have at least spotting a day or two after I finish the meds and have a full blown period 3-4 days later. I'm 5 days out with not even a little bit of spotting. Has anyone experienced something like this with Provera? When I take provera for 10 days I usually start my period before I'm finished the meds. Any thoughts?