I'm pregnant and I don't know how far along I'm in. Please read.?

[astonishtherest]

First day of my last period was November 1 and ended November 6
unprotected sex on November 19
I took Plan B the same day
This week I should have already started
Took pregnancy test came out positive.
How far along am I?
My breast are sore.
have not vomited.