How accurate are the early response pregnancy tests?

So I’m kind of new to this whole thing, so please forgive me if I sound like an amateur. My husband and I had sex on April 9th. I took two early response tests, one on April 22nd (digital) and one on April 24th (line), both negative. I am due to get my period in 4 days. Should I even bother testing then if my period doesn’t come by the 28th?

Thanks for your help!