I am stressed. Will it be like this for the rest of my life now?

Stress has many causes and how long it tends to last depends on what's causing it and how we deal with it.  

It is unlikely to continue for the rest of your life but it is important to tackle the cause early to minimise the impact in the long run.  It might be helpful to ask yourself these questions:
What is causing my stress?
What symptoms am I noticing?
Who could help me?
What action could I take to minimise the impact?