Faint line?

linsey

I’m 5 days late, I’ve been off birth control for like 6 months or so now and I’ve had 3 pretty regular periods, some where a few days earlier or later than the last but never 5 days late. I’ve also felt pretty nauseous almost everyday at random times but we do use protection. So I don’t know how it would have happened. What are your thoughts. Also there are like two horizontal blue lines and idk what those are.