Depo Shot

Hey ladies! I got off of depo around sept/octo of 2015. I have only had TWO "normal periods" since then. It really is getting on my nerves. I had my period last month on March 22-25. It was due this month on the 19th <a href="">eve</a> said. Its hard to calculate how long my cycle is. Like right now i have all the symptoms of a period but no period?  Any help would be nice. 
PS if you're gonna view and not respond just dont bother lol.