My head feels light-hearted and dizzy. i have been feeling like this for almost a week. i have high cholesterol and been having mild inflammation in stomach. i also got my heart check a month ago and said nothing wrong. could be stress and anxiety?

Could be. It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water.