……but a week later I got the Depo Shot. Am I still protected or is there a chance I could possibly be pregnant?
Pregnancy is possible whenever sperm comes into contact with the vagina. Since there was unprotected sex, there is a risk of pregnancy. The Depo Shot you got a week later would not protect from previous unprotected sex.
When someone starts a new hormonal method of birth control (like the Depo shot), they need to use a back up method (like condoms or practicing abstinence) for one week before that method will be effective.
After that first week, the hormones will be integrated into the body and can help prevent pregnancy up to99% (even if ejaculation occurs in the vagina) when taken correctly.
In order for the Depo shot to be taken correctly, the person taking it needs to get the shot every 3 months. Remember, hormonal birth control (like the Depo shot) does not protect against STIs. Only condoms and dental dams can do this!