6 days late 3 negetive tests but symptoms of pregnancy im 30 and i have had 3 kids?

Blood test: A blood test is going to be more accurate than home urine pregnancy test. But it is certainly possible that your period is 6 days late due to other factors such as normal variation, stress, miscellaneous. Symptoms like these are best evaluated in person by your physician. Based on the findings, a treatment plan can be developed to help you.