correction — I truly hope you find some menuchas hanefesh soon. Although this doesn’t directly address your question, it is very important when you are in an emotionally distressed time not to forget about you physical needs. Make sure you are eating properly and sleeping properly, even though you likely don’t feel like doing either. Go through the motions of functioning normally as best as you can. If you can exercise as well that is also great. Emotional pain is much harder to cope with when your body is physically drained as well.
A beautiful book with a large range of ideas on coping with nisyanos is “Facing Adversity with Faith” by M.L. Kramer published by Feldheim. It is basically the “chizuk diary” kept by the author as she struggled with progressively worse stages of MS. Although her nisayon stemmed from a physical condition, her ideas are applicable to all kinds of nisayonos, and are so varied that you can probably find some tools and ideas you can relate to. She tells over stories she heard, vorts, inspirational quotes, mental imaging techniques, etc..
And as everyone already said — find yourself a mentor/ friend/ support group — you don’t have to do this by yourself!