Where Is MY Light At the End Of the Tunnel?

I like to think that I am a naturally happy person. I am in no way perfect and I have my ups and downs, but for the most part I can laugh, smile, enjoy life, and be happy. But it also helps to know where you are going in life to be happy. To stay happy. I unfortunately have no idea where I'm going or where I should be. I feel like there is so much darkness around me. So many things I haven't discovered. Some are about the world around me and others are about myself. Who am I? Where do I belong? How can I be better? 
Because I have no set path for my life, everything scares me. I find myself worrying about even the little things. I worry so much I get overwhelmed and feel like I am going to go into shock and pass out. I usually just end up crying for really no reason at all. I have tried to go down so many different paths and I seem to always get the door slammed in my face. Or I fumble and fall because I can't see ahead of me. The darkness is thick usually. It suffocates me and I get scared so I turn around and book it back to the light behind me. I go backwards instead of forwards. 
I turn to the Lord in tears, frustration, anger, almost every emotion that is humanly possible. All I ever get back is either silence or a calm feeling enough to help me relax and fall asleep. I then wake up in the morning and it all hits me like a ton of bricks. Everybody around me has their life figured out for the most part. It may not be perfect but at least they aren't going backwards. I feel like my Heavenly Father is doing a Barney Stinson. WAIT FOR IT!!! But the waiting never stops. Hopefully it really is like Barney Stinson and along with the "Wait for it" I get the Legendary. :)

I always tell my dad that I don't know what to be when I grow up and his reply is always the same. When you figure it out tell me the secret because I still don't know what to be either. That isn't really comforting most of the time. I think to myself Oh my word, this darkness is never going to go away. Other times it helps me realize that I don't have to figure out right this very second. I have time. 
I am only 19. I have my whole life ahead of me. I understand that, but it helps to know where I need to go in this life. I know that eventually I will wake up one day and this will only be a horrible memory and my life will be better and being happy will be my most common emotion. I just don't see that light yet. I don't see much of anything. I am trying the best I can to BE the best I can. To do the best I can. I just wish I could figure out where I need to be and where I should go. Sometimes the answer is right there in front of my face and I am trying to hard to put it together myself so I end up looking past it. I need to just let the pieces fall together in their own time. I just wish that time was now. I wish I could at least see the light at the end of the tunnel. Maybe things wouldn't be so hard and I could have more faith in the Lord's plan for me and more faith in myself as well. So tell me...Where do I go from here?