With my trigger shot cycles (all fresh cycles) I would basically start testing really early on (something like 1 or 2 days post transfer) and I would see that faint line, and then it would disappear and I'd know that the trigger left the building lol. In the BFP cycle that resulted in an early m/c, I tested very early on, and then there was a day which gave me a negative result, and then the line came back and I knew I had a bfp. But that was in my crazy, mad woman obsessed, queen of POAS days lol. I'm not even thinking of buying a test, sooooooo scared of another you know what...
FX that you'll not need the trigger shot hun!