Army and depression have I ruined my chances?

I was recently on anti-depression tablets I only had 4 I was feeling low and could see no other way out! then I decided what the hell am I taking them for! and decided to join the Army I believe that it will be really good for me and have wanted to do it for a really long time but never been the right time now it is all I want, I want to do Admin, the tablets cant of worked and have no history of depression and never felt depressed my notes just say I was feeling low, they now say that im no longer on them and that I took them back to the Dr and that I want to join the Army what are my chances? the Dr thinks I never really needed them any way but im worried that taking them for a few days will stop me getting in?