nd943 hit the nail on the head! Since he's about the same age as you are (and probably loves to/wants to pitch the same as you do) heed his warning. I don't know what it's going to take to convince you, but (in a "tough love" fashion) I'm giving it ONE LAST TRY.
Let me put you in this hypothetical situation and ask you this "loaded" rhetorical question...
You're aware that a fellow pitcher on your team is experiencing the EXACT same problems you're having. He tells you that his elbow is killing him and getting worse. He's planning on pitching the final games of the season (so he doesn't let his teammates down), but asks you what YOU think he should do. Would you tell him to finish the season and (as nd943 said) risk never pitching again or would you (knowing "pitching is his life") tell him to stop throwing immediately and seek medical help?
If you tell him to pitch the final games you're NUTS! You're NOT stupid. You KNOW what should be done.
If this situation was reversed and a teammate knew what YOU were/are risking, do you HONESTLY believe he'd tell you to keep pitching? NO teammate would EVER tell you to keep throwing "to help the team as much as possible" at the risk of you NEVER being able to take the mound again...and if you keep throwing that is EXACTLY what you are risking!!!
Since you haven't been to a doctor, you DON'T know what's wrong. You're only guessing. You DON'T know what he/she will tell you (though it will most likely be to shut down). While I realize you're worried about the cost, let me put it this way.
HOW MUCH IS YOUR ARM WORTH?!!!
I don't care (and you shouldn't either) how much it costs. If surgery is necessary, then get it done. I know you don't want to look at it this way, but the money is NOT the issue, YOUR ARM IS!!! Worry about taking care of your arm first and the money it may cost second.
Since your first post you've been told by nd943, Chris O'Leary, jdfromfla, and me to seek medical advice, but for whatever foolish reason(s) you've chosen not to do it. How many more people do you need to "hear" from?
At this point I'm getting a little angry AT you and frustrated WITH you. At age 63, my pitching days (other than throwing batting practice) are long gone. Having spent 20+ years "toeing the rubber" you have no idea how much I miss it and what I'd give to be able to get out there again. Your pitching career will come to an end soon enough - why would you want to GUARANTEE its ending prematurely? To put your arm at that risk isn't just stupid, it's IDIOTIC!!!
Not that I haven't already tried to be blunt with you, and knowing that your elbow is now sending 5-10 second "messages" to your brain even when you AREN'T pitching (Boy, that sharp pain must really feel good, huh?!) I guess in a FINAL desperate attempt (knowing that you probably still aren't listening) I should put this in the "brutally honest" style of chinmusic...
STOP THINKING WITH YOUR ARM AND START USING YOUR HEAD!!!
Though I'll continue to read your posts, until you've seen a doctor I won't post a reply...and if you knew how much pitching is MY life, you'd know how much it PAINS ME to tell you that...