You're welcome Pez, that's what this thread is for! Well, that, and mortgage advice, and diagnosis of skin conditions.
Tomorrow one of the embryologists needs to talk you through exactly what would happen once the eggs are outside of you and how it affects them if they have to wait for the speed. The consultant needs to explain the possible impact on the likely number of eggs retrieved and the possibility of doing a fresh transfer this cycle. Maybe get them to tell you the detailed count and measurements for today and for the next three days so you can be sure what's happening. Presumably they will give you the thing that delays ovulation for a day longer, so I would want to know the impact on mature eggs of not being collected/ovulated as planned.
I'd also want to know what would happen if I abandoned the cycle - will you ovulate one or more of the eggs, what is the impact on the next cycle, would you need to wait longer etc.
Having done two cycles I think my instinct at this point, pumped up full of massive follicles, would probably be to see what could be salvaged from this cycle, especially if you can get the payment for it partially or fully refunded, but that might depend on the answers to the above.
Re the bit about telling your manager, that's the easy bit. Surgeries get cancelled/postponed all the the time because of availability of staff, facilities or equipment. So either make something up along those lines, or make out that the Monday scan is you going in for the surgery but they find some reason you can't have it, e.g. you haven't responded to medication, they forgot to tell you a crucial thing (like 12 hours pre surgery nil by mouth) or they sent you to the wrong place.
If you want some stuff googled let us know, I'm sure we can help. Hang in there, you could be pregnant in a couple of weeks 