Hello, This Is A Little Difficult To Explain My Symptoms

Hello,
This is a little difficult to explain my symptoms but I believe they may be neck related.
I'm 57yr female my symptoms are feeling of light headedness at times along with episodes of feeling like I'm going pass out. This is a different feeling then fainting. I have no symptoms of the normal signs of fainting sweating, dizziness or anxiety. It seems that at times when a turn my neck to the left if may bring this symptoms on as of yet I haven't lost consciousness but it has made me have to hold on to a wall or sit down it seems to pass quickly. My neck is tender to the touch but I just assumed it was the muscles. I work in healthcare and do a lot of leaning over patients and I'm sure that my neck area takes on a lot of stress actually at this time during the typing of this my head/neck is shaking. So when I started to experience these symptoms I started to become a little more aware of them. I have appointment with my endocrinologist next week due to my thyroid being out of control and was going to wait till then to discuss it with him. Any thoughts on this would be appreciated

C