My body did not bounce back chemically when I went off the pill. My cycle was 4 weeks, 6 weeks, 8 weeks, then I bled for 45 days. Not the ideal scenario for anyone, let alone a couple trying to conceive.
I did the same thing, Provera to induce a period and then Clomid to help induce ovulation. I did three months of increasing dosages, temperature charting...the works. I made my doctor look at the temperature charts since I couldn't make heads or tails of them. Low and behold, I was in the 2% that it didn't work for. I decided to give up on the baby idea for a while...too much pressure on myself. The next month we got pregnant, no fertility drugs, even though I still credit Clomid for jump starting my hormones again.
If I recall correctly, the odds of having twins are about the same as the odds for having twins without using any fertility drugs.
Good luck and God bless.