The shot question

So ive been on the shot since the beginning of March, I let it run out Aug 21st-Sept 4th. When I was on the shot I didnt get my period or anything, occasionally spotting. But now that ive let it run out, I still havent gotten my period. How did it usually take for you guys to get it back? Yes ive had sex after it ran out but I cant go to the doctor because my insurance is in limbo right now.