I got off the deposit shot in December. And I still haven't had a period. I've taken three test and they all say negative. I've become really tired lately and when I lay down it hurts to lay on my stomach. My breasts are very tender, I have been getting headaches horrible. My stomach also seems to have gotten a little bigger. About a month ago I spotted brown and just thought it was the start of my period but it never came. I'm getting kind of worried.