HI, Youngja, and welcome! You have been given great advice here. You might check out the list of symptoms on the Fibro 101 thread and see how many pertain to you. Print out the list and take it with you to your doctor so you can really explain what is going on with you. I know that if I don't write things down, I get in the doctor's office and forget half of what I wanted to say. So, this might help you.
I hope you can get some answers soon. It's awful not understanding what is going on with your body. Be sure to let us know what you find out. We really do care.
I'm glad you found us and joined in. Don't hesitate to ask questions because we are here to help you. I hope to hear more from you soon.