Chemical pregnancy?? Any help or insight is appreciated and needed!

Meagan
So yesterday at lunch (1130ish) I took a pregnancy test since my period was due Thursday and it still wasn't there. I forgot to look at it (since they are alway negative) but when I got home there was a faint line. I knew it was invalid but I was out of tests, went to Walmart and bought more tests, then tested again, the line looked about the same maybe a tiny bit darker but pretty close. That was at 6:30ish. I work early so I tested again with FMU and the line at 5am is lighter then yesterday's lines, I'm probably going to have a chemical pregnancy and get my period right? Or am I just testing too close together? Any insight is appreciated!! ☺️