CONFUSED..Faint line appears and then disappeared!

Mi

Has anyone had this happen to them??

Today I did my morning pee test as my period is due tomorrow and fancied knowing if I’d be on a 14 hour plane ride with my period!

To my surprise after 5 mins a strange blur appeared next to the cover line.

But then it looked like it was moving closer to the cover line.

till it disappeared completely!!