Chemical? Top test is yesterday bottom test is today

I know your not supposed to test everyday but with it being so light yesterday I took another test this morning with FMU again same as yesterday and the line is barely visible. I can see it in the natural daylight but you may not even be able to see it on the photo.

Do you think this will be a chemical or am I best retesting again in a few days? I’m on cycle day 43 and I’m very irregular.

First cycle since a chemical in April. Took me till July to get my period back!

Any help is appreciated thank you and baby dust to all✨✨