OK if I started my period on dec 16th or 17th and I got off on dec 20th or 21st and I had sex on jan 2nd and I got cummed in what are the chances of me being pregnant?

Too many variables. You will gave to wait to see if you get your next period when expected.

Too many variables. You will gave to wait to see if you get your next period when expected.

Thank you

There is no "percent" or odds except maybe 50/50, which means you either are or you are not.

You will have to wait and see if you miss your next period, if you miss it, then wait 2 weeks to do a pregnancy test