Symptoms

I REALLY need to get this checked out because I have absolutely no idea what is wrong with me or if it's dangerous.

-Breathing is a struggle. Feels like I'm trying to take a deep breath with a straw.
-Constant headaches (already went to the doctors for this about 9 years ago but all they could tell me is its probably stress. Had tests done and everything.)
-Standing up makes me lightheaded and weak but won't go away even after a few seconds.
-Most of the time I need to lean against something for support otherwise I feel like I'm going to pass out.
-Dreams where someone or something is trying to hurt me and all I can do is run and hide.
-Always feeling weak.
-Always feeling worn out.
-My body feels like its 60 years older than I actually am.
-Everything is a struggle, even just walking to the kitchen or doing some dishes.

I just want to pass out.