We are all vaccinated. my wife and 2 kids tested positive. wife n daughter are asymptomatic but son has symptoms. i have been feeling ill. headache, coughing, sore throat but i keep testing neg. is it possible to have covid and keep testing negative?

Yes, you likely have contracted the virus with those symptoms and family history. Yes, I have seen cases with repeated negative tests even with PCR. Even with negative test, you should be in quarantine for 10 days although your symptoms will resolve after 5 days.

The accuracy of the home kits vary but are quite accurate. Ensure a good sample. You most likely have COVID 19. The whole family should self isolate, and please consider pediatric vaccination as eligible.