Provera helps you get your period. Once that starts, clomid helps you to ovulate. I think that clomid is only supposed to be taken for 5 days but you'll have to check with your doctor.
The first day of your period is day 1 of your cycle. So take the clomid on days 3 through 7. Starting around day 10, start having sex every other day all the way through at least day 22 and longer if you can handle it.
If you haven't gotten your period again by day 28 do a pregnancy test. If it's negative and you haven't gotten your period by day 32, do another test. If it's still negative call your doctor and ask if you should start provera again. DO NOT TAKE PROVERA AGAIN until you check with your doctor!
Also you should be charting your temperature every morning as soon as you wake up, before getting out of bed. When you ovulate your temp will drop and then the next day it will shoot up over your average temp. That's when you know you've ovulated.