Source : Webster's Revised Unabridged Dictionary (1913)

Nervously \Nerv"ous*ly\, adv.
   In a nervous manner.

Source : WordNet®

nervously
     adv 1: in an anxiously nervous manner; "we watched the stock market
            nervously"
     2: with nervous excitement; "our bodies jumped nervously away
        at the slightest touch"