Sorry if I've missed what age you are Peroxide, but if you are over 45, doctor will go on symptoms only as tests are so unreliable. You could be peri and have normal or menopausal levels, or anything in between.
It is stressful not knowing when a period will begin, just always take tampons with you and wear a pad when you think you might get a period, or at least a liner. I personally hate the unpredictability but it is what it is.