I am 21 years old, I have 2 boys 4 days away from year apart, the first feb,4 2011 and why youngest feb,1,2012 and I bled for 13 weeks after giving birth.. I started depo 3 weeks after I had my youngest. And I have had unprotected sex with my husband sevreal times sense my 6 weeks when I was cleard to have intercourse again. I have been sxperiencing nausea and vomitting ( mainly at night) horrible heart burn, weight gain, and an extreme increase in appitie, also I've experience sever cramping and tighting of my stomach and horrible headaches and back aches. I have taken one pregnancy test and it was negative but I didn't have a period at all last month. I don't know what's wrong with me and my ob isn't helping at all. Im extremely tired all the time. Please help.