Hi hun, that's great news that you'll be starting IVF soon. I've just started my first cycle and feel exactly as you said excited and terrified at the same time!
Regarding time off it will depend to an extent on which protocol you're doing. I'm doing long which involves 2 weeks of down regging and then another 2 of stims. Time off wise I've had time to attend teach (about an hour including filling in consent forms etc), scan and bloods appointment at the beginning of the cycle I was accepted on, scan and bloods after 2 weeks down regging (this appointment was yesterday). Going forward I've got to have a blood test in 5 days, bloods and scan in 7 days and then it will be scans every other day until collection (hopefully). My appointments now I've started treatment are all first thing ie 7.45-10ish so not too bad for me work wise but depends on your shifts really.
Hope this helps xxx