BFN on Walmart brand but bfp on FR brand?

Hi has anyone taken the Walmart cheapie 88 cents test and it was BFN but turned out to be pregnant with a more sensitive first response test?

I’m about 10-11 dpo and my Walmart test was bfn. Perhaps i didn’t have enough hcg in my urine yet?

Idk if I should go buy first response and compare or if it’s a waste of money and just call it quits.

:(