A lot depends on the number of words per minute, IMO. If you were speaking at your normal rate, then you may well have been doing what I classify as "rambling", which in my case usually results from fatigue, sleepiness, or Spring fever, as jehanna said.

On the other hand, ifitwassofastallyourwordswererunningtogetherandyoutendedtorunoutofbreath, then, yeah, probably a touch of hypomania.