Hi mama! Nine days late with a negative test is definitely stressful, pero honestly, a negative result is usually pretty reliable by this point, pero para sa peace of mind mo, I'd really suggest checking in with your doctor para ma-rule out other things like hormonal changes, stress, or other reasons why your period might be delayed. Stress, exercise changes, diet, even lack of sleep can mess with our cycles kaya hindi laging pregnancy agad! You're doing the right thing by being vigilant, and whatever it is, your doctor can give you the clarity you need. Hang in there, you've got this!