I have been suffering from dizziness while walking( like I am walking in an undulating surface or Earth is moving or feel like I am walking in drunk) from two years. Some times feel my legs is strength less and I walking with my heavy body weight. If I sitting in more than 30 min then this symptoms are more. Two years before at first started left side chest muscle pain , after three months left upper back , neck and lower back pain and after six months started dizziness while walking.