BFP or Chemical ?

Vi

The middle test was run with water to prove to myself they aren’t indent lines since I’ve seen some horrible stories about this brand....my tests seem to be getting darker and pinker but my bbt dropped this morning and I’m on day 3 of spotting which is a sign for AF. Could this be a chemical?

(In person the lines are definitely pink)

Today(15 dpo)

13dpo