12dpiui BFP w/ fmu, later neg on diff brand??

[Lrowbie]

Hi, really hoping I could get some opinions. This was our first IUI after 21 months ttc with 4 early losses. I had 10000 U trigger on cd12 and IUI done an hour later. I have been trying to test out trigger and it had gotten lighter and lighter. Last test before today was on 10dpiui and it was a faint pos. this morning I had super concentrated and got what I think is a slightly darker BFP. I told the nurse at the clinic and she seemed positive that the trigger would be out of my system by 10-11 days max. So I decided to test a few hours later with a different brand and it was pretty much negative. Could it have been trigger still remaining or can I stay hopeful it is a positive? Any advise is greatly appreciated! I attached a picture, top is 8dpiui then 10dpiui then 12dpiuu. Thanks!!!

 

[oneof14]

My doc told me that all tests are different, so don't test with all different brands. Stick to one and test with FMU. Good luck.