should I be concerned ? 🤷‍♀️

Hey ladies , I got a faint line on a dollar store test so took a first response and got a positive a pink line and a yes on the digital first response , I then took another dollar store test 2 days later to see if darkened and it did but like the slightest so I took another first response and it got darker for sure , should I be concerned that the dollar store test are not getting much darker ? Today I’m day 2 of being late for my period and 13-14dpo

Attaching pics of the two dollar store test and the two first response