your fertile times would be around 26-31 dec if your regular, thats only approx, and you can still get pregnant by using withdrawal method as precome has sperm in it so you will need to test around the 14-15 jan
Yes, I am positive that he did not come inside of me because I watched him finish.
It is possible to get pregnant without a man having come inside of you. It's not probable, but it's possible due to preejaculation. I would suggest trying not to get nervous about it and waiting until youve actually missed your period to test if you are typically pretty regular. I would try not to get worked up though because you can trick your mind into messing with your period and stress can work against your period also. Just try and relax an breathe and know that in the end everything will more than likely work in your advantage :)
Do you know for sure he did not come inside of you?