Oh, sweetheart, stress is so hard, especially when it includes worries about loved ones / innocent children. We want so badly for things to turn out a certain way that we spin our mental and emotional wheels desperately trying to steer fate.
Well, I'm not sure any more what fate is or whether I believe in it. I do believe, based merely on 60-some years of experience, that things always work out. One way or another, things do work out, just not always the way we hoped. So I wonder if it would be useful to look closely at the worst possible outcome, and see that even THAT contains new possibilities for learning, growth, and love among all parties involved. That might leaven the stress that you feel, at least a little.
Plenty of people find that almost any activity that temporarily drags them into a less-stressed state, at least for a little while, gives the brain and body a chance to recover a touch of grace. This can be prayer, chanting, music, dance, exercise – whatever serves to give some relief.
The brain is fueled by blood sugar, and can burn out its available supply quickly, leaving you even more drained. So eat carefully – small, balanced, regular meals are far better than one late "I-gotta-eat-NOW-what-can-I-find-that's-quick" meal.
And the brain is restored by sleep. If worry is keeping you awake, really throw yourself into any of the above alternatives to help you find a sense of balance. Just don't excercise too much during that hour or two before bedtime.
Your (niece?) has a life trajectory that neither of you can see from here. It may be far harder, scarier, or sadder than what you want for her. That's difficult, and it's also exciting. She may learn things about herself and her strength that never would have developed without those challenges. As much as we'd like, we just can't protect children from life.
So, last thing to do? Find the tears, and cry them. Find the laughter, too. It's almost always there. Maybe hiding behind the tears.
I'd love to hear more about what's going on if you'd like to p.m. me.