Help clarifying whether I should take another test

So I supposed to put the test strip for 1-15 mins it says to get the result right?

I put the strip for 30 seconds ( I am so dumb, did not read the pamplet carefully) and removed it because I saw only one line, then I read the pamplet again.

Do I need to buy another test? And test again tomorrow. Or can I trust the 30 seconds strip reading?