Spinal with Femoral Block and Sciatica

So I met with the surgeon yesterday and the Dr wants to do a spinal with femoral block.I am scared that I will be awake although he says no, I will not be awake. I have read from others where they did wake up.

I have horrible anxiety disorder. I just don’t want to be awake. He reassured me that I would not be awake. Dr said much safer with spinal less blood loss and less risks

My other concern is I have an L4-L5 disc protrusion. I told surgeon I was concerned about the spinal aggravating my sciatica. He says that also should not be an issue

Thoughts or advice appreciated