Thanks everyone. I asked my coordinator about the Gestone too and she said the same thing....take it once a day. I'll do my best to keep that as close to 24 hours as I can.
Regarding agencies, I agree with the others...choose the donor that is right for you rather than the agency. I dealt with many agencies in the beginning as we had trouble locking in a donor and missed out on a few. They were all lovely and their service was pretty much the same.