You could test now, I tested the day my period was supposed to come and it gave me the results right away.
You probably would get an accurate answer if you tested now.
I'd say the 25th (this Thursday) would be a good day to test, you could test before that since I took two weeks from the 11th. Today is 13 days since the 11th, so you could get a positive today. I usually test 13 days after ovulation because 13 days after ovulation is when AF starts for me.
Good luck!