Scream silently
It is possible to scream to Hashem Yisburach in a silent whisper, screaming tremendously, and no one will hear anything, because one does not release any sound outside, he just visualizes distinctively the scream in thought etc. [see inside (the source) the matter]. (Words of Rabbi Nachman, article 16; Outpouring of the Soul 40) Na Nach Nachma Nachman MayUman