I got the shot seven weeks after I gave birth to my son, and I just started getting nauseous and my breasts have been hurting, but the nurse said that a regular urine test would pick up me being pregnant. Now it is almost five months from when I gave birth and I can feel something like gas bubbles inside me. Would a blood test help me determine if I am pregnant? And if I am, is the depo shot going to hurt the baby?