I have done 6 x stim cycles and never used progesterone gel support (only used injections) so can't help you on that one. I have done 2 fets and am currently on my 3rd fet using progesterone pessaries and they keep you on these even after positive BT until 8-12weeks gestation.
Re blood tests, when i was with Sydney IVF they only did the one blood test even after a positive outcome i was never asked to do another one -just told to wait till scan date.I am now with QFG doing FET'S and they do intial BT then they do a follow up a week later and then a week after that its scan date. Sorry have not been much help - i would just call your clinic and ask i have always found the nurses at both my clinics extremely helpful - goodluck with this cycle.