i missed my june BC.. and I had unprotected sex on the 16th.. should I strt my July pills or take a pregnancy test?

Hi,
We will need some more information, in order to provide you with the best answer.

You missed your June BC. Did you miss the entire month of June?
If yes, can you tell us:
1. When was your last menstrual period?
2. When did you stop taking your pills, and why? How long have you been taking birth control pills prior to June?
3. When are you expecting your next menstrual period?

If you had unprotected sex, then you will need to wait until your next expected period before taking a pregnancy test (assuming your period does not begin within the week that you expect it to begin).

Please read the instructions that come with your birth control prescription, as it explains how to start taking your pills. You will need to begin taking the new pack as if it were a new prescription; most of the time, you begin the 1st pill in the pack on the Sunday (or other day of your choice) after your period begins.