Faint Evaps on Wondfo or BFP?

Still TTC after our chemical pregnancy in April. I never had a period in May and it is now June and I'm wondering if this is it again. I've been testing periodically on the Wondfo test strips and have been noticing shadows of lines showing up around 5 to 10 mins after testing. It's outside the 3 minute time frame, but the strip still feels moist to touch so is it really an evap? The pink hued shadow is showing up on multiple strips. I took it as a possible positive so I went to follow-up with a FRER but BFN. The wait is the hardest part especially when I'm having so many new symptoms I didn't even have back in April. We are hoping, wishing, and praying we have been blessed with a sticky lil' bean this time around, but if not we will try, try, and try again.