Hi! I just finished taking Provera last night, had no side effects and started my period 2 days ago. I had to take it because my second attempt at IVF I was a poor responder (didn't make it to retrieval) went back for my WTF appointment, still hadn't had my period (3.5 weeks later).
I am kinda a hasten cycle this time. My clinic closes around Christmas, so if I hadn't gotten my period by Nov 7th, I would have had to cycle next year. I am in the same boat as you - already paid high deductibles, etc.
Honestly, I think you have to be mentally ready to start again. My story - I had a chemical pregnancy with my first IVF, I wanted to started acupuncture and diet changes before my next. As stated above, I had a worse response the second time around than from my first. I was ready to dive back into another back to back cycle from my first to second, but wanted to be able to say I was doing everytthing I could for the second one. Hindsight, I don't know what I would have done.
Good luck with your decisions, I know it's overwhelming!