Missed Seasonique Pill

Okay so I am on the seasonique pill. It’s a 90 day pill with a placebo week. I’m in my second set of 90 days. Anyway, I had Sex where he ejaculated inside me on the 22nd. However on the 25th (Christmas) I missed a pill. The instructions with my pill say to consider taking an emergency contraceptive pill if you miss a pill 3-5 days after “unprotected” sex. I did not take an emergency contraceptive pill.

Do I have anything to worry about? And when should I take a test to make sure?