am I pregnant or was it false?

Sarah • 20 | Wife to Mr. Jeremy | my husband and I are TTC for the first time. Found this app in hopes that it could help us.💖
I took a pregnancy test a week prior to today. It came out with a very Faint positive and then I took (a week from when I took the positive pregnancy test) another test this this morning and it came out negative? I'm not sure what this means but I don't know if I should take another one or if I should wait to see if my period comes. Someone please help me out.