Jaw and gum area pain- in the bone, at an old extraction site?

I cracked one of my lower right side molars about 6 years ago and they extracted it, in the area there is no tooth just gum area. I woke up this morning to a dull pain in my neck just under the jaw at the area of the extraction. After washing my face I noticed that there was also pain when I pushed on the area of the jaw on my face, and after eating breakfast there is intense pain in that same area of the gums. There are no lesions or abrasions to the interior gum area. The only thing that I've noticed is that I'm having some issues with an old filling on a lower left side molar, it seems sensitive to cold and hot- for about a week.

Unfortunately I've been living in China for the past 8 years so their cure for a tooth problem is to extract it...I don't want to lose another molar on my lower jaw. I've only got two left, and if they extract the left one then I won't have any lower molars on that side. I've asked about getting a crown put on it before but I was told I'd have to go through the procedure of a root canal with NO medication (novicane or anything else)- In the states I usually have laughing gas since I have a dental phobia.

My question is- are the two things related? Or is the right side jaw problem something else? It's not like I can go to the dentist and get an xray of the area because they don't have those kinds of dentists here. Since I'm in a small rural town most tooth problems are dealt with at small open air shops along the street...so if it might be serious I would have to take a 5 hour bus ride to a big city.