No. I’m going to nitpick on terminology here. You said you have already been diagnosed with sciatica, and are relating the similar pains. “Sciatica” is in reference to a very specific nerve impingement of the sciatic nerve, which innervates the lower back, buttock, and/or various parts of the leg and foot. You can’t have “sciatica” anywhere else in the body, but you CAN have a pinched nerve, which is essentially the same thing. I know, I know! Fussy terminology thing. Sorry.
Your doc thinks it’s a herniated disc… did you have an MRI done? What caused the herniation in the first place? In the neck, they just don’t appear out of nowhere… there’s usually some kind of trauma involved, car accident or bad crash/fall that has a whiplash-like effect on the structures of the neck. That it’s appearing along your entire spine signals to me that something is amiss. Have you been in a car accident within the last 2–3 years?
I would also consider a second opinion, perhaps that of a neurologist.