I had unprotected sex on august 20th. my partner didn't cum inside me. i'm on depo-provera and have been since january. i started bleeding 3 weeks after having sex. can i be pregnant?

Doubtful: What you have described indicates a very slim chance of pregnancy.

Probably not: If you've been getting your Depo-Provera shots every 3 months, you would probably be due for another shot sometime this month. It's very common to start having some bleeding toward the end of 3 months - probably the bleeding is just a sign that it's time for your shot. Do a pregnancy test to be sure though.

Unlikely: If you are current on the Depo Provera (medroxyprogesterone) it is unlikely you are pregnant. However, i would recommend two things. Check a urine pregnancy test and always use a condom. Additionally, you would benefit from std testing since your last sexual encounter was unprotected.

Not pregnant but: Still at risk for sexually transmitted diseases. It would be best to use condoms consistently.