One day before period, pregnant?

Okay, I had my last period of Oct. 31 of last month,my ovulation was on the 16th of November. I had sex almost everyday with my boyfriend, and on my ovulation date. No protection. I used to have irregular periods but ever since September I've been on time,and they are regular. Now, I'm one day before my missed period. I have had every symptom of pregnancy almost. But a false hpt. So could I still be pregnant? Should I wait til later to try another test?