FRER help

MaKayla
Yesterday I got a BAM positive (sorry my phone sucks it broke and the camera is sucking) but negative digital 10 minutes later as expected. Later I got another positive. This morning I took a free and completely negative like no faint lines but I also took a few more digitals. Both clear blue digitals came up positive and the FRER came up negative again... Someone explain to me what the hell happened?