Wondfo faint positive

I took a Wondfo, Premom, & First Response this morning. The Premom was negative, First Response was negative, but Wondfo was faint positive. After I seen the faint positive I tested with Wondfo again (same urine, fmu) and it was negative. Was the “faint positive” an indent? It showed up within timeframe and was pink in person. Now I’m just confused and bummed☹️ has this happened to anyone else and ended up being a true positive? What are y’all opinions or experiences with Wondfo brand?