First Response Digital

I took one of these this morning because I had it and it's two days before AF is due to arrive. I don't know if anyone else has used them but the clock on them is supposed to blink. Mine didn't, then it read positive but the clock stayed as well. It was so confusing, so I took a regular first response but it looks negative. I was just wondering if this had happened to anyone else and if you were pregnant or not. I'm including photos. Any insights?