Clomid, Almost 8 weeks late, No sign of period

Nikki
I'm on my 2nd round of clomid, 100 mg this month. I was supposed to start my period May 4th. There's no sign of it. On day 6 of Provera.  I've had very mild cramping.  No symptoms of pregnancy. Every test I have taken says not pregnant. I have PCOS. I am 28, been TTC for 4 years. Multiple miscarriages throughout the years. 
Anyone else have to deal with this? I'm really to the point that the frustration is too much.