How accurate are the easy at home pregnancy tests

Sarahi

I opened a easy @ home pregnancy test a couple hours ago, but I couldn’t pee lol. Anyways I just took one and this came up. The instructions do say that you should use immediately though. Is this true??? Positive??? 3 more days for my period.

UPDATE: sorry I forgot to clarify I used the test that I had opened just a couple hours before when I couldn’t pee.