Do I have a claim against my father's estate?

My father died a couple of years ago. I have only just now learned that his estate, probably less than 50K, was administered by his daughter-in-law who had a POA. My brother and my sister-in-law receive a monthly mortgage payment from a piece of property my father owned. I suspect I have a claim. He died, as far as I know, intestate. I have a good relationship with my brother but his response to any direct question is that "Jane takes care of all of that." Jane is not, in my opinion, not fully trustworthy. What should I do?