You have had to lower expectations about your plans for the future and are currently mired in negative feelings. You have been rejected or denied something you counted on and must deal with a feeling of dejection and loss.
The challenge is to figure out how to move past despair onto a new path. Or, if possible, figure out how to continue on as you were going, moving out of the shadow of melancholy by adjusting your aim to an attainable goal for the present where before you might have been overconfident or perfection oriented.
If you are living your life fully you are bound to be looking for the positive aspects in possible future events. This may lead to moments when the future becomes a present that isn’t what you expect it to be. This sometimes comes about too suddenly to adjust emotionally to the new situation and to a feeling of loss that requires a period of adjustment. Do not allow one such event to cloud the positive parts of your life that are still present. Sometimes the change is not as negative as it is just unfamiliar and unexpected, if looked at creatively. Sometimes you just have to move through the roughness to get back to the smooth.
You must gather all your hope and frustration and love and right yourself for the way out disappointment is not attainment goals, it is being mindful and aware that where you are is where you must begin.