Chemical pregnancy?

So i would be 4 weeks and 4 days today. However, my tests are getting lighter. I’m not bleeding or anything, but my tests are so faint now that they won’t pick up on camera.

I got a positive digitals and test starting at 8 DPO. Today would be around 14/15 DPO. and it’s very very faint. Would you think chemical?

Today is the bottom test. Took it this morning.

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