I am having this Lightheadedness - drowsy feeling all the time. I have a mild headache, Neck pain, and left side body pain from shoulder to leg, even mild chest pain with heartburn. Have nausea but no vomiting. Have tinnitus as well. Sometimes the Lightheadedness is so worst, i leave everything and just sleep on bed. There is a strange weakness all the time especially in the morning. I get tingling hands and feet if I sit / sand / hold something even for a small duration. I don't have an appetite problem, I eat regularly.  2 years back the doctor said that I have IBS. Consulted doctor(GP, a neuro surgeon) about this, they suggested to take Vit B12 and Vit D tablets. Taking Vit D 60k tablet and neuromin-od tablet since a month. But no difference at all. This has been happening for the last 1.5 years and now the symptoms have increased a lot. I had multiple ECGs due to this. All came normal. I don't know what is going on with me. Please suggest whom to contact.