What Causes Numbness And Burning On The Shoulder And Rib Cage?

Question : I have been having left side from my left shoulder down to the end of my left rib cage numbness and burning on and off for over a year now it has facial tightness mainly on the left side and burning for 2 months and now head tightness and burning for the past Month along with the facial issues. My left leg has been hurting in my shin and sometimes feels weak to walk. I have been to the ER 3 times and my brain CT was negative for stroke or masses, along with negative lung xray and I went to a neurologist and had an MRI of my brain and it was also negative. The also did 10 X-rays on my neck since I had a cervical fusion done on my c6 and c7. That showed my hardware was stable. Every time I've gone they tell me it could be a pinched nerve along my shoulder shooting to my face but won't do an MRI of my neck and spine. Im so tired of feeling like this. Even now intimacy is hardly enjoyable because the burning sensation shoots all over my face when I'm trying to relax and enjoy. Since May, my stress level has been pretty extreme. Someone please help, it is literally put me in a depression.

Should i push my neurologist to do these MRI's or have a spine surgeon do them. I feel like sometimes foe example tonight my head is burning so bad i want to throw up and it hurts. Coolness seems to alleviate it some .