For the past couple weeks the left front corner of my head has been tender to touch. I don't remember hitting it. Yesterday morning, that same place felt numb. The numb spot is the size of my palm.And if you touch, and I mean barely touch a spot, and it kinda shoots to the back of my head, and then the left side is all numb. And soon as you take your finger off, it returns to only the one spot that is numb. And today my left eye started twitching. Is this a blood clot?