Seems the last 18 months, I've been dealing with mental illness. Is this normal? It just happened and now it's here.

I have bad anxiety and bad depression(possible bipolar) diagnosed.

I don't know who I am anymore, I've lost all my friends, and no one who I'm not paying understands me.

Have I always been mentally ill?

The last 3 years I was in the military, I didn't deploy or go to war but it was very stressful. Most stress I've ever been under, could that have caused me to snap along with being away from home for so long?

My first year of being in the military I was fine(functions, had friends, generally happy), but it seems after my first winter with up north where I was stationed something clicked in my head.

I intentionally overdosed on drugs, had to drink to be social, depressed out my mind, anxiety was high.

how is it this just happened so suddenly? I should be out, I'm 21, young having fun. I'm stuck inside my room, staring at the computer screen.