I feel like I'm repeating myself since I've posted this on the forum a few times already but I wanna get it out there whenever I can. I suffered a concussion from a tree branch falling on my head in 2009, and in 7-8 months made a FULL recovery. The symptom that lingered for the longest time was the fatigue, but yes, it did go away completely. I'm not going through PCS for the 2nd time after getting a concussion in February, and I as well have frequent mood swings, even throughout the day.