I get the impression that you are alone or not receiving enough help.
What kind of help are you receiving ?
Who is nearby that you can rely on to shoulder this burden with you ?
Can you turn to anyone ?
Basically, you need to share your problem. Relieve the load by finding
others (professional others, family, friends, etc) you can provide you
with either immediate or long-term help.
Another front you can work on is to seek counseling for yourself.
Perhaps you could benefit from having someone to speak to,
especially if this person may possesse information about support
networks that would meet your specific family needs.