Slowly I Am Going Crazy...

Does anyone know what the physiological reactions to stress are? Because my body has progressively been going crazy on me for the past 6 days (leading up to my leaving for school tomorrow), and it has been leading me to function on a severely downgraded scale.

First I was extrememly exhausted, which I thought was normal, seeing as I had just completed a very emotionally and physically exhausting week. But then I started feeling tired and lethargic all the time, even when I was getting 14+ hours of sleep. Then I got achey. Every muscle in my body was hurting, and Tylenol wasn't helping. Then I got nauseous...INCREDIBLY nauseous. I haven't thrown up, but it feels like if something takes a wrong turn in my stomach, I could. The nausea has been present since Tuesday night (it is now Friday morning.) I have dizzy spells where I can't stand up for fear of passing out, and I go between hot and cold and hot and cold within a matter of 5 minutes. Also, I had the freakiest thing happen to me yesterday. I broke out in bumps. Little white bumps that looked like bug bites (and were as itchy as) and erupted all over the back of my arms and on my legs and progressively grew for an hour until they decided to disappear again.

Am I going crazy, or is this a mind condition based on the fact that I am leaving again. I'm really struggling with this right now. I even went to the doctor (to see if I picked up a bug or something from Mexico, or I am having a backlash from my sunburn), but according to him, nothing seems to be the matter, and unless I get a fever or something odd happens, I should just wait it out.

I hate waiting...there is no time for waiting right now. I leave tomorrow.

GAH!