Pain in base of neck, top of spine when I yawn, swallow, etc?

You just slept the wrong way... that happens to me sometimes. You do NOT need to call a doctor haha it's totally normal

I cured my sciatica with this natural treatment ( http://cure-sciatica.info/ )

Normally, I would not answer a question like this as my expertise is generally in medication but I had severe sciatica while I was pregnant with my 3rd child (after having had twins) and I had sciatica so bad that I was finding it difficult to walk. I tried massage therapy and physical therapy and could not take medication

I went to the chiropractor and the pain was instantly relieved. My hips and lower back were out of alignment because I had carried twins the year before. On occasion a Doctor of Osteopathy (DO) can also work but they usually only work on one joint at a time - the chiropractor will do your whole back which works faster. Anyone who does not believe in chiropractors will tell you they are quacks - don't listen.

I don't necessarily believe that chiropractors can cure things like diabetes but they can definitely relieve some types of back pain especially if a pinched nerve is involved which is usually the cause of sciatica.

You may have a muscle spasm in your neck that has possibly led to a trapped nerve. Massage the area affected as firmly as you can stand. Keep moving your head and neck if you are able to. Try an anti-inflammatory such as Ibuprofen. See your doctor and ask about muscle relaxants such as Diclofenac or low dose Valium. I've been there and it is agony.

Doctor. Now. Best thing to do. Could be any number of infections.