Hi hon!
You are right about the VE taking longer to come back. and as far as IVF with rotating shifts, because everything is so pre-planned, you would have a schedule to work by... so could plan in advance to take time off. I beleive that after the transfer you have to be completely mobile for a few days also, so you would need time off work.
Im not sure if with IVf, they would take the sperm and egg at the same time, or if they could take the sperm, freeze it, then the egg... you would have to inquire about that. (or maybe post that question on the ivf board, and there are a few ivf ladies here too

)
Dont feel bad about not being happy for those who have children.
You want a baby
With all your heart, and its hard to see others have what you want SOOOO badly.
Totally understandable. Don't be hard on yourself. You are going through an experience that many people can't even fathom... most of the general public is unaware of the issues of infertility.
((hugs))
you are free to come here and vent.