Feeling concerned...lines are not getting much darker

I was supposed to get my period yesterday so I'm a day late. Tested day before AF got a vfl, tested today I have a faint line slightly better than the day before.

With my daughter on 3rd day of my missed period it was a blazing positive...can't help but feel nervous, this is the first glimmer of hope in just over 2yrs of TTC. Any advice?