Had sex on Aug 8, the condom broke, but she got her very first depo shot on July 25, the 4th day of her cycle. She has not had her period, and it has been over a month, there are some symptoms of nausea, but nothing serious, is she pregnant? Is the depo effective? Also her doctor said, the shot would take 1 month to come into affect, is this true? Please provide a detailed response, we are very worried