I had a bad fall on the ice back in late December. I bruised my tailbone and had a concussion and bruised my knee. Everything slowly healed but I m still having a vertigo type dizziness at night when I turn over in bed and upon rising in the morning. I checked with my doctor in early March and she said it was okay because of how hard I hit the back of my head on my concrete porch. But yesterday, I started having like flashes of lightening in my peripheral vision in my left eye. Any ideas what s going on? What s my next step?