According to the symptoms you provided (feel like life is going down hill, often thinking about death, often worrying being nervous without cause), you might be experiencing panic attacks.


The most common symptoms of a panic attack include heart palpitations, shortness of breath, chest pain, nausea or trembling. While the exact cause is still not completely understood, there are various treatments that might be useful. Almost all of them might be grouped either into medications or psychotherapy.


Cognitive behavioural therapy has shown good effects in people suffering panic attacks. The medications might include anti-anxiety drugs.
Since both anti-anxiety medications treatment and cognitive behavioural therapy are complex, it is highly advisable to visit a psychotherapist for longer treatment which might take several months. The treatment is usually a complex process which would need a great deal of cooperation from your side. So, arm yourself with patience and prepare for a long treatment. In the end, the results might turn out to be quite satisfactory.