A week late...take a test?

So I think we did everything right this month and I am about a week late. But, other than a fog on my brain and being tired...and maybe some mood swings...and some back pain (which isn't abnormal for me anyway), I don't have any symptoms. I've always had an irregular period so I'm hesitant to take a test until I would be hitting the 6 week mark of pregnancy (when most symptoms show up). I feel like I'm just delaying the inevitable and I'm holding onto hope of a pregnancy that isn't really there. I'm already taking prenatals and eating well etc because we are ttc. So idk. Do I test? Or wait?