False Positive??

I’ve been having some weird symptoms lately and usually when my Mom is on her period, so am I! So this morning I decided to take a Rite aid brand pregnancy test and it DID shave two lines but NOT facing the same way. So I left out for a few hours to take care of somethings and came back to look at the test BUT the line was GONE ? should I test some more ORRR was it a false positive.