6 days late and negative test confused

Had a short period at the start of September on the 10th , then stopped on the 15th then started on the 29th September and i didn't stop until 9 October and now I was due 27th of this month but nothing and I've been having cramps like a period and crying a lot lately and nausea , anyone had this before ? I'm going to the doctor today , I also had a miscarriage at the end of April , I'm going crazy seeing theses negatives