Fibromyalgia Symptoms HOME

Hello, I'm 18 and I'm pretty sure I have fibro. I've been having very bad back and leg pain with extreme fatigue. I went to the dr. and they told me it was probably just the flu. They took x-rays of my leg and did blood work to make sure, but nothing came up abnormal. My sister was actually the one who suggested that I might have fibro. I've been living on tylenol for the past week, the only thing I'm not sure about is this has only come about in the past week and a half. What can I do to see if I really have it?