I had a freeze all cycle as I too have pcos and I had 20+ follicles but only 11 mature eggs collected. From memory my estrogen was borderline around 12,000 a couple of days before egg pick up but I had ovidrel trigger and as soon as they started taking eggs out there was fluid in my abdomen already. I ended up with OHSS and a week off work and was in severe pain. I had egg collection on Friday and by Monday morning they did an ultrasound and my abdomen was full of fluid.
I know it sucks but you don't want to risk OHSS it is awful and obviously can be very dangerous. If you were to get pregnant the OHSS will be far worse and last much much longer.
Ivf can be a long journey and the first cycle is often about finding your body's natural limits and the right combo and dosage of drugs. I know you don't want to hear that but the good news is you had a good response and they can work with this for the next cycle to hopefully get things right and safe for you x
Ps for what it's worth I had a freeze all cycle then has to wait about 3 months for a frozen transfer and that frozen transfer is now a 9 month old DD.