Rainbowbabe - I'm not sure why they asked me to do it twice a day but I know when I went for my blood test the day after ET they said all my levels were perfect. So I'm thinking once your DF gets her follow-up blood test then they will adjust if need be.
I know how you feel about freaking out. My Bestfriend was doing IVF the same month as me and everything that was different would make me freak out. I guess all clinics do things differently and we will never know why lol.
I do think if it is worrying you that maybe give the nurses a call and let them know your concerns. They may be able to put your mind at rest. Better to call them rather than worry yourself sick.