I was previously married for 14 years. I am trying to get my disability. Will I draw off of him, myself or the man I'm separated from now?

I'm trying to get my disability. I'm separated from my present husband. He gives me $200 a week. I applied for and got Medicaid. I applied for disability last year I think but was denied because my husband and I were still together and they used his income and said I had too much coming in. Now we're separated. I have multiple problems.