Sounds like AMS. What altitude are you at and what altitude do you live at?
Take it easy! Don't exert yourself.
Hydrate (your urine should be clear)
Vitamin C suppliment (like emergen-c)
Eat balanced but lower protien meals (pasta)
You can get O2.
Some people take aspirin... I don't know that it helps that much.
You can see a doctor about a Diamox Rx.
Don't drink alchohol or coffee, smoke, or do drugs while you have AMS.
If you start to: experience a severe headache, have trouble thinking (getting goofy), have trouble walking (coordination), develop a cough, tightness in the chest, wheezing, or any other trouble breathing, see a doctor.
-----
It is what I would do if it were me. It is not me and neither are you.
Mountain Rescue - High Altitude Dive Rescue