Hi Dr i just had a baby five months ago and i got sexually active before being on the depo shot. when i started using the shot i had non stop bleeding in December and November, Jan,I bled for 3 days and in Feb i spotted twice,Mar i spotted once. i am suspecting that i am pregnant my breast are so tender,i get dizzy,cramps,headaches,fetigue and i crave for salty things, i went to a Gp for an ultrasound and he said he can t see anything. what is happening