Period after depo shot.?

well to start off i got my depo shot in june of last year and i only took one shot due to many troubles towards my heath. So since i took the shot i hade my period the whole first mounth and half of the second mouth after getting the shot. then i didnt get my period till end of jan. it was only for a week the i havent agin since then i dont know what to do or even if its natural for dealing with the depo. u see i dont have and health insurance no money to go see a doctor i was wondering if anyone can help me. thanks.