@miissalina I was told they have to be over 20mm. I don't usually feel bloated until the day of egg pick up, although funnily enough my ovaries are 'jangling' early and I've still got about 3 or 4 days to go, which has got me a little worried. The ultrasound hurt too, again unusual for me. My follicles were measuring 10mm on friday.
Its bound to feel different for you eh? 60 follicles is pretty insane. The one time I got mild ovarian hyperstimulation I felt like I had a bag of oranges in my uterus, so bloated and sensitive when I was walking.