I had a mild concussion from snowboarding back in 2013, and the doctor back then said it wasn t normal because after 3 months I was still in bed not being able to get out. I suffer from being lightheaded constantly almost fainting, many headaches, and I am always tired, I had taken a blood test and I am not anemic, I am still waiting to see a neurologist. But would like to get other thoughts and opinions!