Fake positive?

[19CLT92]

Hi I took s tesco test after 5 minutes it was negative I opened it up then left it come home from walking the dog an hour later and this is here? Could I have made the ink run to postive by opening?

Hey, I took one of those yesterday and afterwards I looked at the reviews online. Apparently these are notorious for false positives and still haven’t been recalled. From others I’ve spoken to it sounds like the line has to be fully thick, and the false positives leave that thin line after the 3 mins. I’d take another test using a different brand to be sure.