Feeling out of it.. slight dizziness.. indigestion, gassy, diarrhea, brain feels just.. really out of it.. shortness or breath, helps when gas is gone?

Many things: Many things may be causing you to feel this way. Have you started any new medications as of late? It is possible you have a viral gastroenteritis. It is best to see your doctor for a proper evaluation.

Nerves?!: At your age the whole thing sounds like nervous tension. A viral infection cannot be ruled out information is insufficient.