I cheated was this wrong!!?

Ok so the 2ww sucks. I had a 3 day transfer (ivf) on the 12th. I go for blood work sunday am. I caved and took a test today. BFN. Do you think it was to soon and my bloodwork could be different.My are killing me and I have been crying alot the past 2 days(not like me) Has this ever happend to anyone else. and got a positive in the end?? What do you think