I gave in and tested today and got a BFN, I heard that day 5 is when the HCG starts so I was curious. I took it around 4pm too and have increased my water intake so that could have had an effect. I know it's still very early so I'm not too worried and just hoping it changes.
If this doesn't work I know I will definitely be taking a holiday after our next transfer probably for the whole 9months haha