I had sex with my partner the day before my period was suppose to come on. We had an unprotected sex, he never came inside of me but it was full of wetness. And still my period haven't came on. Could I be pregnant and when is the right time to take a hpt?

ANY time you have penile insertion you run the risk of pregnancy. You can reduce that risk with birth control and/or timing, but not eliminate it.

The best time to take a test is 1-2 weeks after you miss your period.