How long does withdrawal last?

Recently, I've been binging on three different prescription drugs. Tramadol, Vicodin, and Ritalin. I know I'm very stupid for doing all that. 4 days ago I ran out of drugs and now I'm withdrawing. I've felt so uneasy, uncomfortable and very nervous since then. I've also been very depressed too. Nothing seems to comfort me. My girlfriend can't even comfort me, and I can't even pay attention to TV. How much longer must I suffer these withdrawals? And please, don't insult me for how stupid I am. I already know how stupid I am. I just want to know when I'll get to feel normal and happy again.