So confused

I’ve been taking loads of tests! I’m getting faint lines! However this morning I took and FRER and clearblue digital and both negative! So I went and bought another 2 cheap tests! I peed on the top and put the bottom in water! Yes I know I’ve taken it out the packet but that was to get a better photo of them both! But I swear the top is a faint line but bottom is definitely negative (which it should be as I dipped it in water) so why am I getting a negative on a FRER? Soo confused.