Faint line on 2 but negative on 2 others

Hi everyone. I’m new to doing this but I recently was suppose to start my period about 4 days ago and haven’t gotten it. Decided to take a test a couple days ago and thought I saw a line but couldn’t tell. I gave it a couple days and took some. One around 11am which was digital but came back negative then around 2pm I took one which had a faint line (the 2 test in the middle) and took another after to just see if I was seeing right. It showed up on both. Then took a clear blue not long ago and came back negative but I’m

Sure it’s because I drank a lot of water before taking it when I shouldn’t have.

Just wanted some thoughts on it . I put it in black and white also to see it better.