Just had my eggs harvested....They are worried about hyperstimulation.?

We are doing invitro currently. yesterday I had my eggs harvested. I had 65 follicles and they removed 24 eggs. I had more to remove but the ovary it was on was hiding behondmy usterus so they could not get to it. I did my trigger shot so they are currenly ovulating and I am in quite a bit of uncomfortable pain. How long will this last and they seemed concerned I may get hyperstimulation and may have to postpone transfering the eggs if that happends. Has anyone had this happen and what occured? Also, how long does this weird pain last? This is just a crazy week altogether