I started my period on the 13th of November. I got off on the 17 I am a 28 to 30 day cycle, I had unprotected sex on the 19th. What are the odds of me being pregnant?

Without knowing or tracking your fertile days, there is not enough information to even guess.

If you are having sex, esp unprotected, it is possible to become pregnant. You will just have to wait till next month to see if you have your period then.

Fr_Chuck is correct that its nearly impossible to guess.

That being said, if you truly only had a 4-day period and cycle "normally" (average fertile days are between cycle days 10-16) then your chances of pregnancy are not great. Nothing is impossible though so you'll have to see if your period or a + test is in your future.

But of course anytime you have unprotected sex you can become pregnant.