The things I had happen with OHSS were basically my abdomen becoming rigid and swollen, I gained 5kg in a matter of days from all the fluid that leaked into my abdomen, and both ovaries hurt like hell! I couldn't stand up straight or breathe properly.

If it's OHSS, it's important that you start drinking gatorade/powerade/gastrolyte - you become quite dehydrated and those types of things have the right balance of salts and stuff so that it can reduce the amount of fluid that leaks into your abdomen.

Could the pain be a result of ovulation? It is probably really important that you do get checked. And get panadeine, you should not have ibuprofen or other anti-inflammatory drugs while TTC, but I can understand the desperation for pain relief. Perhaps your GP can give you some panadeine forte when you see them?

BW