Eating In: First Response

How Accurate Are Home Pregnancy Tests?

I'm a week late (now 8 days) for my period. But the First Response home test (not the digital but the one with the lines) clearly says I'm not pregnant. My husband and I have been "trying" for about 4 months. I'm turning 39 at the end of this month. I had a copper IUD in previously. The month after that came out I had a 30 or 31 day cycle. Then the 3 months after that I had a 24 day cycle (exactly the same each time). Now it's been 32 days and I'm still not having a period. I know that I should just "relax" and wait another 3 days or a week...