Forgive me if I misread, but it sounds like you tried to jump right back into all the sports you used to do after dropping them for a good amount of time. If so, it's little wonder that you've lost your edge. If you stopped practicing cold turkey and tried to get right back into the swing of things, your body isn't used to the strain and rigor you used to put on yourself. I would suggest easing back into your activities, build up your body's strength and stamina back to where it was before you dropped everything, and then that might solve at least part of the problem you've been having.
Other than that, I would suggest everything that's already been suggested.