IUI # 5 is pushed back - again.

It was suppose to be today - but I was not ready and then we set it up for tomorrow but according to my bloodwork - I am still not ready to ovulate - so now it is going to be Sunday morning - which works out well because then I will not miss anymore work. But I already have a 27mm follie - how much bigger can it get?? They said it will probably go to 30 mm - that is crazy.