Is it normal?

I have never fully missed a period. I have been late before, but in the past 6 months my period has been very regular. I am recently married and having children at this time isn't really ideal, but we would be fine if it happened. I am now three days shy of being a month late and I have taken around 6 pregnancy tests ( all negative) I have many symptoms that could be pointing to pregnancy but I don't know. My biggest question is, has anyone else ever been not ready to have a child or not trying to have a child and been ridiculously depressed over negative test results? I mean I really have always wanted to plan my pregnancy and I know it's not ideal right now, but I'm seriously crushed...