Dear jmamee,
The HL is for you to rest. COs after the embryos are transferred to you, it is the critical stage of embryos trying to implant in you. So you gotta rest and minimise too much walking. It is for u to not have work stress also. I think it is necessary. Baby first priority. But for some, they take less than 17 days I heard.
You definitely need to inform your company about your IVF, cos during stage 2 when you stimulating your follicles, you need to go (sometimes) on alternate days to scan the growth of your follicles in the morning, so you need to take time off from work.
Are your superiors and colleagues supportive of your TTCing?