So confused and anxious. Has anyone else had this?

Michelle
I tested yesterday morning and got a vvfl on the little stick. When I retested this morning, I got a much darker line. But I used a FRER last night and got a good second line, but a lighter test line this morning. So one test is darker today, one is lighter. 
Has anyone else had this? I'm so scared it's another chemical pregnancy. 
(The top photo of each collage is from yesterday, the bottom is from this morning.)