Positive then negative next day???

Gina • 💙Due Due 2022🌈 Dec 2021💖January 2021💙July 2018

Anyone ever have a bfp followed by a bfn the next day??? I had light spotting only when wiping for a day then bad cramps and nausea the next morning... took a test cause it was odd period symptoms for me, the test read positive. When the spotting continued the next day I took another test, negative. The lite Spotting stopped two days later then got an other negative later that week.... chemical? Implantation? Was first month TTC so any advice is appreciate. Thanks!!