Thanks OriginalP, I totally agree with you re HPT, and to be honest it is really a mute point as AF arrived within seconds of doing the HPT. I was only asking as I have never in my life to my knowledge had a + pregnancy, and even though AF had already arrived, I was grasping at straws hoping just maybe there had been some sort of implantation for it to show faintly on the HPT, and have nothing to do with the trigger. From my research it does seem that the average for 5000iu to be out of your system is 10 days, so maybe I did have hcg enough to register on a sensitive HPT.

If this was the case it would would mean I was one step closer and give me some hope for the future, which TBH I am sadly lacking at the moment after 6 IVF ETs and 1 IUI. I guess just wishful thinking. Thanks for your advice.