Aqua85 good luck for your cycle.
3 out of 4 is great. I only got 3 eggs and my original collection and all three fertilised. We did a day 5 transfer with the first emby which resulted in my son. The second we transferred this year in Feb but it didn't take, then we transferred the final one in May and I'm due early Feb with another boy. So, it does happen, you don't need huge amounts of embryos.
I also think day 5 is probably better cos you have a much better idea how they are travelling.
I also did a pre and post transfer acupuncture session which is meant to help and try to just rest as much as you can after the transfer.
Good luck!! Keep us updated on how you go.
Stephhamer I hope your tww is going well!