Should I be concerned?

[Kalecat]

I just found out I'm pregnant yesterday at 11 dpo. Wanted to check today (12 dpo) to see if my lines were getting darker, but they look about the same? I know HCG doubles every 48 hours... but it should still be going up in the meantime. Should I be concerned my lines aren't darker today? Attached 2 pics - top ones are 11 dpo, bottom are 12 dpo.

11dpo is still quite early to do a test.
I would start stressing if your lines aren't darkening from 12dpo- 20dpo.
Give that little bean a chance to start producing the hormone, it's VERY early

Congrats

They look very happily positive to me.
My tests looked very very similar with DS and never got any darker. I ended up waiting until I was about 10 days late and took a digital instead, just to properly confirm it.
As coffee said, it's early days.