Has anyone had a BFP wilth a day 2 transfer??

I had 7 eggs collected at EPU yesterday and got the phone call today to say that only 1 had fertilised with ICSI. They couldn't tell me what cell the embryo is at because it's too early. As we only have one embryo they will be doing transfer tomorrow (Day 2). I am devastated, I thought we would have a much better result than previous cycles as my DP had an open testicular biopsy to try to find more/better sperm than he normally produces.

My first cycle produced 15 eggs, 3 fertilised, but only one made it to transfer. BFN.
2nd cycle produced 8 eggs, but none fertilised.
This time around, I was dissappointed with only having 7 eggs, but to only have one fertilise gives me little hope.
I have had 3 stim cycles as I've never had any to freeze.

I know it only takes one, but I am so scared that as they have to transfer it at day 2, then maybe they aren't very positive about success.