Is Vitamin D availabe OTC ?,, I swear I am just coming apart daily,, every nerve in my body feels like a live wire,, the tremors are getting worse, but blood test show no increased SED rate,, CPK is in normal range, 99 on a 0-200 scale, I dont know what my D level is, it was low in the past, thank you mrs D,, your very knowledgeable