Scared

I was due on the 9th December. Was late so 2 days later I done test it was negative. I gave it a few days and done another test and it was positive. Made an appointment at the doctors and done a test she said it was negative. So I got a clear blue test. That said I was 2-3 weeks. It's been a week and half since. Do you think I should do another test or go with what I already have. Been getting nausea and cramp like feelings and still haven't come on.