Pregnancy test

April 15th my husband and I had unprotected sex and we got carried away and he “stayed” inside me. Later that night we were talking about what just happened (we have no kids) and with how the world is today we both decided that I should take a plan b JUST INCASE...the next morning i took it. It’s now April 22nd and I want to take a test..when should I take a test? I feel like it’s too early right now? Am I wrong?