Depo...sex... Late period...Help me PLUH-eeze

Ok...hello all...

I got my first depo shot (first one in 5 years) on June 8th. We (my child's father) had unprotected sex (yes he came in me) on June 18th (a lil happy fathers day lovin). Since 5th grade (I am now 23) I have ALWAYS had a regular cycle. Even when I was on depo 5 years ago, my cycle came like clock work. NOW all of a sudden... Its off. I am 10 days late. I have 2 boys. 5 years old and 4 months old. With them I knew I was pregnant because my regular period didn't come. However, this is different because of the shot. I need opinions. I don't know what to think. With my first son, i knew I was pregnant because I couldn't take black and milds anymore. With my second son I knew I was pregnant because after 3 bars I didn't feel anything. Not a tip, not a buzz, nothing. I have tender breast and I am a lil more tired. Idk y'all. What do y'all think.

P.S.

I know I should make an appointment with my doctor but I want to wait it out and see if Aunt Flo pops up...