Is Anxiety really the culprit? Need Help..?

I have a multitude of symptoms that several of my doctors CLAIM to be Anxiety related but based off the research I have been conducting it does not match. Most of my research consists of online health forums and interviewing others with similar symptoms. I am going to start with the first and the very worst and consistent of all my symptoms and that is extreme, sometimes throbbing, head pressure. Please try to understand how severe this pressure is, as if my head is a balloon so inflated that its on the verge of bursting. This pressure also comes from my eyes, forehead, nose, cheeks, teeth, temples, neck, and ears. This pressure at times evolves into a full blown headache which is also pretty severe. This symptoms is present daily 3/4th of the day with very little if no relief. The second two worst symptoms are dizziness and nausea. Self explanatory, I can't function when I feel like I am going to vomit and fall off this Earth at the same time. These symptoms come and go several times a week. Third, is severe fatigue, physically and mentally. I cannot concentrate nor think. I am exhausted even if I get a full nights rest. I am practically a walking zombie most of the day. This symptom is also present on and off several times a week. I very rarely get anxiety and if I do it is only because of my poor declining health. I am a 19 (about to be 20) year old male who feels as if he is older than the Earth itself. I am not taking any medication nor am I planning on it until I figure out what the hell is wrong with me. My insurance is garbage so it takes over a month see my doctor. I am starting to plummet into a very deep and dark depression. I am hoping someone here can relate to what is going on with me. Thank you in advance and hope no one here has to suffer as much as I do.