There are a lot of choices that you may not know about if you don't hang around the good fellers in the timber businsess. You can sharpen your chain yourself or have a shop do it, BUT what you should do is go to a professional saw shop and replace it with a non-safety chain. A pro-saw shop won't sell anything but saws, blowers, forest equipment and maybe some lawn mowers.
The anti-kickback chains sold to consumers are very low performance items. If you replace the chain with a professional chain you will be simply amazed at the size of chips and the speed they will fly out of the cut. Just respect the fact you have removed a worthless safety device and use your saw correctly. Then it is definitely worth sharpening that chain.