Wow! I feel for you. I have been a single parent of two boys for almost 5 years now. Working with special ed... I can understand how demanding it can be dealing with all of the specialists, documentation, etc associated with a child. I do not think people really consider what it is like to deal with this before they have kids. It is a whole different life style. Just this alone is its own full time job. So you have a three jobs, one of a mother/father, provider, and resource specialist. I can imagine that you are warn out. A person never knows what it is going to be like, and when it is a child you care so deeply for it feels scary. Every caring parent wants the best for their kid. Though... there are some that check out and run off. I believe the Lord sees the heart of every person. He promises to care for us and provide for us.
He says:
Revelations 22:12 "And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be."
(KJV)
Deuteronomy 4:31(For the LORD thy God is a merciful God

he will not forsake thee, neither destroy thee, nor forget the covenant of thy fathers which he sware unto them. (KJV)
Isaiah 54:5-10 (New International Version)
5 For your Maker is your husband—
the LORD Almighty is his name—
the Holy One of Israel is your Redeemer;
he is called the God of all the earth.
6 The LORD will call you back
as if you were a wife deserted and distressed in spirit—
a wife who married young,
only to be rejected," says your God.
7 "For a brief moment I abandoned you,
but with deep compassion I will bring you back.
8 In a surge of anger
I hid my face from you for a moment,
but with everlasting kindness
I will have compassion on you,"
says the LORD your Redeemer.
9 "To me this is like the days of Noah,
when I swore that the waters of Noah would never again cover the earth.
So now I have sworn not to be angry with you,
never to rebuke you again.
10 Though the mountains be shaken
and the hills be removed,
yet my unfailing love for you will not be shaken
nor my covenant of peace be removed,"
says the LORD, who has compassion on you.
And for those who check out/leave/abandon their family:
Jude 1:6 NIV
And the angels who did not keep their positions of authority but
abandoned their own home—these he has kept in darkness, bound with everlasting chains for judgment on the great Day.
Jude 1:6(KJV)And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
1 TIMOTHY 5:8 8But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel. (KJV)
1 Timothy 5:8If anyone does not provide for his relatives, and especially for his immediate family, he has denied the faith and is worse than an unbeliever. (NIV)