Hi, I'm new to this but I wanted advice. I've always been 28 days no exception, me and my DH have been trying for 3 months and this time I think it's it. I'm 6 days late and I've got lot of pregnancy symptoms and no period ones. I was devastated when I saw Not Pregnant on the test and now I'm worried it could be something worse. Is this common or should I seek medical attention?