HELP!!

So I’m around a month late for my period and have been having some super questionable symptoms lately. Went to the dollar general here and get Rexall pregnancy tests......took one at work and it came back negative, so I waited a day and took another one last night. I see a very faint line......but of course Debbie downer I am, I’m starting to wonder if the test is showing a false reading. Wondering if any of you have had this happen? I immediately tested on a cheaper $1 test and nothing showed, waited and took another $1 test this morning and still nothing. Please someone help!