ऊँ गतत्रासाय नमः
Om gahta-traah-saaya namaha: One can use this mantra to reduce anxiety or trahasa by chanting it and calling upon Lord Ganesha to remove it.
The Literal meaning of this mantra in English is
“O Lord Ganesha, Please remove the anxiety caused to us”.
The mantra is inclusive of word Trahasa, which means anxiety.
(taken from Vedicfeed site)