It's hard to tell if it's TMJ, particularly when you have other issues going on in your mouth. What does sound like a TMJ symptom is the ear fullness. The structures of the temporomandibular joint are enclosed in a capsule, like a Mickey Mouse balloon inside a balloon. When there is something wrong inside this capsule,swelling begins and pressure is placed on the ear structures resulting in the pain that you are experiencing. So this makes me think there is TMJ involvment, but I don't know if impacted molars can cause this or not...
What I would say is that you should most definitely get your wisdom's out by a NM dentist who specializes in TMJ. I've seen so many stories on here about people with TMJ who get their molars out and end up in really serious trouble because it wasn't properly done. I've seen stories about people who seem to get TMJ from molar extraction. This is usually because the person doing it isn't properly trained and doesn't really they are dealing with other complex issues in the jaw.
Also know that some people's TMJ issues go away completely when they get their molar's extracted! They have an amazing NM dentist who understands the complexity of their issues and treats them accordingly.
I would hate your situation to worsen...before going through with your extraction, I'd really recommend seeing the very best NM in your area (travel if need be) and get his/her opinion. Have them do the extraction.
Another issue I'd be aware of is that many people derive issues from either the aggressiveness of the extraction or from the length your mouth is pried open. Many times, if you have very light issues, extraction or root canal seems to be the trigger that causes the full-blown TMJ picture to emerge (this was my situation). A very skilled modern NM dentist should understand this and be able to do the very best job possible on your extraction.
Really hope I'm not freaking you out here...these are very common situations and I don't want to see another person's situation worsened unnecessarily. I want your extraction to solve your problems, not create more!
Wish you the best in your recovery! Let us know how things go