All of us can feel depressed at times about things that happen in our lives, but clinical depression is more than just a feeling state. It is really and illness. The newer antidepressants have milder side effects, and they will often disappear after a few weeks. So there is a chance that if you wait long enough, it will go away and you will feel better, but you might have to wait for months or years for this to happen.
Depression is a serious illness that can become worse.
Generally, it takes about 6 weeks for an antidepressant to improve your symptoms. It may take a bit longer if the first one does not work and you switch to a second. Yes, there is. And plenty of it. People with depression do get better.