If you are looking for a way to determine your latitude and longitude go to the find location page. where ddd = 1-3 digits for degrees, mm = 2 digits for minutes, ss = 2 digits for seconds and D = N,S,E, or W. The seconds and special characters (spaces, apostrophes, quotes) are all optional in this format.
When there is a low level of carbon dioxide in the blood, the blood will be alkaline in nature. This will lead to the blood vessels of the body constricting, thus reducing the flow of blood in the body.
Having too much carbon dioxide can have the same effect (high acids in the blood) but that is rarer, as to make it happen you'd have to breathe in a slow, even, shallow manner, which would be rather uncomfortable. So if anything, try to hyperventilate a little bit, and see if you feel better.