Scared!!! Back tingling/pins and needles constant? help identifying cause

For a week now I have been getting tingling pins and needles sensation in my upper back towards the left of my spine. sometimes it goes numb and it is pretty constant. I dont know what to do, im not sure if I should see a doctor?

Does this mean I have permanently damaged a nerve? Im kind of scared cause today I thought I could feel a bit of tingling in my face. Could someone help me distinguish the cause of this and if i could have possibly done some permanent damage? Before the tingling started I did get this really weird pain in my back. Also what should I ask for from my doc if I go to see him?

Thanks