I had a nasty reaction to Depo. I suffered headaches, joint aches, swollen arm, breakthrough bleeding, and horrible cramps, also nausea, and mood swings, and gained 25lbs after the shot. (and yes it was from the Depo...I didn't change my eating habits, and after the dose wore off (about 3.5-4months after getting the shot) I dropped the 25lbs in about 3weeks.
Google Depo Provera there are TONS of websites dedicated to Education women about the dangers of Depo.
P.S. My Daughter was born in March of 2007 too She was born with Asymetrical Septal Hypertrophy a thickening of the center heart muscle that partially obstructs blood flow through the ventricles. She's on Meds to slow her heart rate thankfully this usually clears on it's own in the first year, but in the meantime we have EKG's every 2months to check her blood flow the last one was really good!