My best friend just went through a terrible experience with the hospitals... She too had been experiencing pain in her arms and legs and had went to the main hospital in town on two different occasions to try to figure out what was wrong with her, but both times the doctor that saw her couldn't find anything wrong so just had her take some pain pills. The third time, she started losing feeling in her hands and feet in addition to the pain and she also had sever pain in her back / side, but because of her bad experience with the main hospital, she decided to go to the county hospital instead. At the county hospital, they did an ultrasound around where she was feeling the back pain. They noticed something and thinking it may have been a gall stone, they rushed her back to the main hospital, but with an order for immediate entry and had a specialist set up to see her when she arrived. After much more rigorous testing and a few nights at the hospital, they found that she had pernicious anemia which means that she wasn't absorbing Vitamin B12. She is now in recovery after dealing with this for a few months, but is still unsure when she'll be able to go back to work (she's now on long-term disability because of this). It really is too bad that the first few times she had gone to the hospital, she was quickly dismissed with a few pain pills instead of trying to determine what the root of the problem was.
However I also know some people that complain about doctors performing too many tests, and again equate it to them just being greedy. So I do get that some doctors are stuck between a rock and a hard place. Either they perform many tests -- some that end up being unnecessary -- just to get the most accurate diagnosis, or they treat the issues with what is most likely the problem (in terms of what's seen in the rest of the population) which may not be the correct diagnosis.