40/IvF/last hope

Hello! I just had a transfer on 3/21 3 day fresh transfer with the only 2 embryos had. I am now in the dreaded wait for the blood test on 4/1. This is my first fresh transfer I have had 2 retrievals previously and this is my 6th transfer and we have 1 daughter from a FET in2016. I’m praying this works. Trying not to look at every twinge and cramp I get but it’s hard. Since I have never done a 3 day transfer before what is a good day to start testing , doesn’t it take them longer to implant than a 5 day?