Got a question ???

I took a hpt Friday 11/14 it had a faint line which makes it positive then I missed my af Sat 11/15 decided to go get a diff hpt an take it came out negative. So today is my 2nd day of my missed period still no af. So question is is there a chance I still could be pregnant? Had someone tell me yes bc diff hpt has diff sensitivity so wat so y'all think???