occipital neuralgia?

I'm struggling with what I think to be ON onset by both poor posture and when I was recovering from a back issue, I laid on a couch and watched a TV that was up and to my right, so my neck was "crooked" that way repeatedly throughout the day, for a few months. The pain seems to be the worst when on back of my head. Very tight and wraps around to my left eye and in my jaw sometimes. also feel naucious sometimes. Hurts to the touch on the back of my head as well. Anyhow, has anyone had shots for this? I'm scheduled for Monday. I'm worried frankly about the pain because if it hurts so much to the touch, what's a needle going to do? I've have numeroug needles in my back and spine, buttocks over the years, tolerated well. Nervous about this though. Also heard that if shots are successful, then botox is option but not good results. any thoughts and any support would be most welcome.