What will happen if my dad died and give all will to his wife and I get nothing and I never married and I’m disabled?

Definitely consult an attorney. I assume from the way you wrote your question that his wife is not your mother. Do you have a copy of the will? If not, get one. If she won't give you one, then file a petition with the probate court to proceed intestate on your father's estate. At least there you would have a chance to get up to of your father's estate. If there is a will, that will control most things. If you father had life insurance of investment accounts you will need to verify who the beneficiaries are perhaps you were named on one of them?