Depo injection

Emma • 19 and a pharmacy student 😄💊 just trying to get through school and see the world 🌎 SO since November 2015 😍👫
I have just gotten the depo injection even though it was within five days of my period I waited the full seven days before having unprotected sex with my SO. I have a reaction to latex so condoms are super uncomfortable and sometimes painful :/ do you guys think I'm safe from pregnancy just from the DEPO alone, is there anything I can do to reduce my chance ?