Disappointment stinks!

Have you ever been disappointed by something you didn't even think was that important to you?  I feel like I am invisible at times or maybe people just do not take me seriously. I don't know.  The only thing for me to do is to stay focussed on God and His purpose and then I can be certain that His plan and purpose will be fulfilled and that is the only thing that matters.  Right now I need help with this huge disappointment I am dealing with right now, please help me Jesus!