I had my second depo provera injection the day I was meant to (not late at all) but I had unprotected sex about 2 hours after I'd had the second one and I'm worried that there could be a possibility I'm pregnant. All I'd heard is that it worked instantly but I'd really like to settle my mind as you can imagine it's constantly on my mind! I'm in a relationship and have been for 8 months and I am really trusting of my partner so I just don't think of protection, silly me! Please help me!