I'm 8 days late for my period. Took 3 hpt all negative. Is it possible to be pregnant? Only time I missed a period was the last time I was pregnant.

Unlikely, but... Can retest in 1 week. A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. If a woman gets her normal regular period, then she is not pregnant.