Survivor Benefits

My husband died in 1998. I received survivor benefits for my children & myself for 8 yrs.
I remarried in May 2006 and separated 4 months later. Due to a lack of cooperation from my ex, the divorce was not finalized until the following year, We maintained separate homes. Do I lose my ability to collect widow benefits when I reach the appropriate age? I am 48, lost my job due to illness & may need to apply for disability shortly. I do not have enough credits because I did not work again until 3 yrs after his death. Can disability be received against his benefits?