Test has gone faint this morning 15dpo

[YourOlivePanda]

I’ve had 4 chemical pregnancy’s in the last year. This time I started taking progesterone and asprin 3DPO. I was expecting high hopes with this one as this is the strongest tests I’ve ever had. However this morning the test has gone lighter 😢 any advice? Or has this happened to anyone before?

top test is 12DPO and the bottom test is 15dpo

They look very positive to me. My first 2 pregnancy tests were positive then line disappeared within the hour. Currently 18 weeks pregnant!
I would wait a week or so longer and retest if you're really worrying but I think congratulations are in order