Hi Jade, firstly I am not sure as I haven't had my IVF yet. It does sound a lot but surely they would have said at your scan?
It depends what size they are too. I have had IUI scans and I think they only told me the good size ones. I over-responded to Clomid on my first cycle and had eight good sized follicles plus smaller ones (I have polycystic ovaries too). I am not sure if it counts as OHSS but I felt awful when I ovulated - hot, sweaty, in and out of consciousness, feeling faint, cramps.
Your follicles might be tiny though and may not all be released. If you are concerned then I would check with your clinic. Xxx