Hello, I am 48 yrs old and female. I have all the signs of a Thyroid problem , weight gain, fatigue, hair loss , muscle soarness, sleeplessness , thickness in my throat, etc. However, I have taken a blood test and it has come back negative. Is it true that a Thyoid problem can be hard to detect? Should I request an x-ray on my throat? How accurte is the blood test?