When should my lines get darker?

Question

Currently only 3w6d. I found out at 11dpo I was pregnant(3w4d) but I feel like my lines aren't getting darker? 
Top picture was 3w4d at the 5mm

Middle picture was 3w5d

Bottom picture was this morning 3w6d
Taken about the 8or9mm

Answer

They are darker 🤔

Answer

Mine took 2 weeks on this brand to get dark

Answer

I can’t see the difference. I do think they’re getting darker. The hcg levels double every 48 hours.

Answer

Looks fine to me like ite getting darker slowly

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