Error message but dark line

Ann

I was feeling queazy and my period is very late. Within 20 seconds an error message happened on a CVS pink top digital test. That’s never happened to me before so I opened it up and I saw this not just a faint second blue line but pretty dark.

 I’m gonna go to the store and get another test, but I’ve done a lot of searching, and people who had this kind of line inside a CVS digital say they were pregnant.

Any experiences? Or have a guess?