No matter how hard life appears to be, all of its vicissitudes, set backs and so forth; nothing is too hard for the Lord.
Isaiah chapter 40:31 says- "but they who wait for the Lord shall renew their strength; they shall mount up with wings like eagles;
They shall run and not be weary; they shall run and not be weary;
they shall walk and not be faint."
A constant reminder of how awesome God is, what He accomplished when He created everything is necessary in being at peace through whatever you're going through (Isa 26:3).
Nahum 1:3 talks about the Lord being great in power.
Psalm 27:1- "The Lord is my light and my salvation; whom shall I fear?
The Lord is the stronghold of my life of whom shall I be afraid?"
It isn't just that His thoughts and ways are infinitely greater than our (they most certainly are); the most important thing to remember is that His way is the only way.
Read Numbers 23:19.
What you are going through is painful and heart breaking.
The Lord sees your pain and understands it.
He will never test you beyond what you are able to bear. And He is able to save and deliver you from it. He is faithful, will never leave you nor forsake you.
He is the Alpha and Omega (and everything in between).
You truly can do all things through Christ who strengthens you!