About all I recall apart from the bloating and weight gain was pain, mostly in the lower abdomen. If you seem to be not passing enough urine in line with the amount of fluids you are drinking, it can also be a sign of things turning bad.

I wouldn't ordinarily be thinking that someone with 16 eggs collected would be at risk of OHSS, but with your previous FS cancelling after 8, it could mean that you are quite prone to OHSS, like me. How did you feel a couple of days after the 8 egg pick up? I found that the times I developed OHSS, I was in a bit of pain immediately after EPU (who wouldn't be with that many eggs?!), felt ok-ish the following day and then really, really bad over days 2 and 3 after EPU. I was a bit nervous going for a day three transfer with my 20 eggs, but my FS was pretty confident that I'd be ok. Mild OHSS after IVF is fairly normal, but I'm quite scared of it after my previous experiences.

BW