I've just had a setback as well and it's so frustrating. My 13th concussion happened December 7, 2012. Fell off a six foot folding ladder getting off a trailer on a flat deck truck at work.
Played football in high school and University so got a few there as well as water skiing, motorcycles, Tae Kwon do etc. The last one I had had, was almost ten years ago and it wasn't nearly as bad as this one.

Although last time I was KO'd when my ski hit my head. So being 40 now I assumed it would take longer but it's still brutal. MRI shows some scar tissue but no bleeds...and my doc and the neurologist both have tried different meds. I guess I was just wanting to see if anyone else has had lots of PCS symptoms and if a relapse was common. I thought I was taking it easy but apparently not...