Clomid

I have pcos, I rarely ovulate, so I never have my periods. I've taken 3 cycles of clomid, early last year, feb, March, April. I took a cycle of clomid this month, which I ended about Tuesday afternoon, I did take provera to start my period. When I took clomid the first 2 times I was on 50mg and it didn't work, the last time and this time around I took 100mg and I've had hot flashes, nausea, and dizziness, and I did ovulate the last time, but no pregnancy, I'm hoping this month is it, I've been trying for 2 years now, and if it doesn't work I'll be devastated! Anyone have any similar stories, or success with pcos and clomid?? Id love to hear! Thanks!