I just wanted to say that people do know when something is wrong with their bodies and they should not back down in trying to find out what is wrong.
I'm sure when I went to the doctor and told him my blumillion symptoms he thought I was behaving like a hypochondriac. He ran some blood work and diagnosed me as having anemia. After feeling over my lymph nodes and missing the swelled ones for some time I directed his hand to the spots and told him I still felt sick. He ran tests afterwards and sent the results to specialists. They ran what seemed like a thousand more tests before telling me I had cancer. If it had not been discovered at that point they had told my mother I would have only had 3 weeks to live.
This isn't to scare anyone. Look up as much as you can dealing with your symptoms. Sometimes the things causing you problems can be mere vitamin or mineral deficiencies. You have a right to know so don't be afraid to speak up about your problems.