So confused! Don't know where to go from here

Shelby
So three days ago I got a faint positive on a cheapie and on first response 3 days before my period. now the day on my period(which is today) I took another first response and it looks negative? So heartbroken and confused idk where to go from here? Was it a chemical? Did I test to early? I just need advice😔 top from 3 days ago bottom from this morning