I have a question. I have ADD (inattentive version). Sometimes, after overthinking for most of the day, I feel the almost acid-like painfullness below/behind my eyes. Could this be stress, or tiredness from constantly thinking unwanted ADD-driven thoughts? (This happens when I'm not on medication). When I DO take my Adderall, I feel this INTENSE feeling of relief and calm, like I can finally focus... and all my extreme stress just melts away, if only for a while. I can breathe out a big, relaxing sigh of relief.