I am 26, i woke up this morning with a sense of impending doom, the sense got worst and feels like my heart is ponding in my chest, my hands are shaking, i am dizzy,my mouth is watery ( like before you vomit) and i have a tightness in my chest.

Panic attack: It definitely sounds like a panic attack. Please seek medical attention immediately as other medical conditions cannot be ruled out.

Need to examine: 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. Wish you good health!