I tested negative (at the Doctor’s office) every time, even at 6 months pregnant & with the baby moving, heartbeat present! Oddly, the only test which showed anything was “abnormal cells” in my blood work! (Not pregnant, but with abnormal red cells!) However, when NOT pregnant, I’ll test POSITIVE every time! Oddly enough, I’m almost 72 now, and still test Positive to a pregnancy test! I just have an odd body, I guess!
If you are 10 days late, I’d wait about 3 more days (no later than next Monday) and then go to the Doctor for a test & (possibly) an ultrasound to check it out. You can be late sometimes, if stressed, ill with cold or flu, etc… If over 13 - 14 days late, it’s time to check with the M.D., even if you are getting a “negative” with the dip stick. The kits for at home can be inaccurate at times, or you may have a medical condition which is delaying your menses. Best to check it out if you’re 14 days late – that’s long enough for a M.D. to find out if you are pregnant or not, since you would be about 4 weeks pregnant, (if you are) by that time, and possibly 5 weeks along. If not pregnant, M.D. needs to check you and find out what’s causing the delay.
Good luck! (By the way, are you hoping for a positive test?)