Start takin a B-50 vitamin for that stress. It should help over time. You'll notice your piss getting more yellow, that's a good sign. And you may notice more energy. It's good stuff.
Get more protien too.
And maybe switch from coffee to tea, that can cut a little on the stress load. There are chemicals in tea that can reduce stress (green tea that is, black to a lesser extent).
And just to add in some ultra-cliches, get more sleep and drink more water. That could never hurt.
Oh and sorry to shit on your parade but supplements really can't fully compensate for not eating healthy, but thats your choice what you put in your stomach so I'm not gonna direct you there. But like everyone knows, fruits and vegetables will do you good if you want to be 'healthy'.