Can yu still get pregnant on depo, if yu had unprotected sex?

Unlikely: You can still get pregnant on any contraception. Nothing is 100% effective. However, your risks are very small.

Yes: Unfortunately, every form of birth control has a failure rate. I hate to say it, but if you have the symptoms of pregnancy (enlarged/tender breasts, weight gain, larger belly, nausea/morning sickness, period irregularity), then get a home pregnancy test or see your fp to have a test done. Sometimes, the sperm and egg just happen to find a way to get together no matter what we do...