Advice

Hey guys. So I ended up getting my 3rd depo shot 5 days late. So that put me at 13 weeks and 5 days from my last depo shot. Me and my bf have unprotected sex through out that time because I thought I'd still be protected. I went to health department and they said they can't guarantee I was protected so they gave me a plan b and tested me and said it was negative. They gave me my 3rd shot and told me to wait 7 days before unprotected. Since I haven't had a period and wasn't more than 2 weeks late getting my 3rd shot we waited 4-5 days instead of the 7. We both are not planning on having a baby but agree that if it happens it's fine. How long should I wait until I test?