An orthopedist is the right type of doctor. There are sports orthopedists who specialize in sports related injuries. You might try finding one near you. But I suspect you'll get the same answer.
From what I have read, tendonitis is generally treated with anit-inflamatories (ibuprofen, tylenol, etc), rest, followed by gradual resumption of activity. If you have a bad case, a shot of cortisone may be worthwhile. Other overuse injuries are treated similarly. Since you are on a tour, this is probably not what you want to hear.
Depending on the level of pain, which must be pretty severe to spend 600 buckazoids on x-rays, you may have a tough decision to make regarding the rest of your tour.