When to bring up that I might be pregnant??😂

My SO is away at a softball tournament in Chicago and for some odd reason I decided to take a pregnancy test and it came back so faintly positive I even have to squint to see it in pictures. I don’t want to tell him before one of his games and get his mind off track but I just can’t wait to tell him at the same time, but also don’t know if I should tell him since it was so faint. Any advice is welcome!!