Hello Sorbus,
I am sorry to hear that this is such a difficult time for you. Please do not lose hope... Whether it be in weeks, months, or (hopefully not) years, this crisis will eventually pass.
As is obvious from another off-topic thread, I find it helps me to focus on the positive aspects of any situation. In your case, you have the opportunity to become closer to your niece(s)/nephew(s) than you might otherwise have done, and you are forming memories with them that will last a lifetime.
Hang in there.
Be Well,
Lynn