Loneliness has a particular quality — it convinces you that it is permanent, and that it is only yours. That everyone else is connected, and you alone are somehow outside it.
The Prophet Yunus was alone in a way most of us will never experience — in darkness, inside a whale, beneath the ocean. And what he did was not wait to feel better. He made dhikr.
And Allah answered. Not eventually. Immediately. "So We responded to him and saved him from the distress. And thus do We save the believers." (21:88) That last phrase is worth sitting with. Not just Yunus. The pattern holds.
There is a presence that does not leave. Available in the middle of the night, without an appointment, without judgment. The Qur'an describes Allah as closer to you than your jugular vein.