I took painkillers last night around 9PM, Tramadol... I never usually take pain killers I had them from a surgery I had like 6 months ago, I had really bad cramping yesterday so I figured I'd take it to help me sleep. Now it's over 12 hours later, I've had coffee and I'm still SO DROWSY. I don't know how the effects would last this long but I (although I've never been drunk before) I imagine that's how I feel right now. Is it all in my head?