Should I take a pregnancy test or wait longer?

Hey all. I just wanted some insight as I'm generally a super paranoid/worrisome person. I took birth control for only a week, April 16th-21st. I had a lot of emotional issues with the medication so I stopped taking it immediately on the 21st.
 That was also "my week". My boyfriend and I had unprotected sex on the 15th (Yes I know it takes time for birth control to work properly). We don't and didn't use anything other than the "pull-out" method for contraception otherwise. 
<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> is telling me my period is now 11 days late and my (whole) breasts (not just the nips) are super sore and they hurt so bad. Should I be worried about pregnancy at all? Should I take a test? Can taking the pill for such a short time cause your period to come super late/be completely missed? Otherwise it could be stress because I'm supposed to graduate soon and we've been looking at apartments as we're trying to move out together. 
If anyone has any questions that might help just ask please and I'm more than willing to answer