Question about faint lines

Alexis
Hi Ladies,
So I got my BFP and I am super excited!! My first test was yesterday and the lines were faint. So today I tested again with two different tests and they both came back positive; however they are still faint. Should I be concerned about this? Are they supposed to get darker? Should I wait a few more days and test again before I make a doctors appointment?  I'm just so nervous about chemical and tubal pregnancies!  TIA!!