Am I, as POA, responsible for my parents' debts, and will Medicaid take the house?

Although I never signed as being the responsible party for my Mother can a Nursing Home collect the money from me? I would have been able to pay for the bill but the Nursing Home insisted that I apply for Medicaid when my Mother's Medicare was running out. I did sign a "Notice Of Medicare Provider Non-Coverage" form but I signed it as her Power of Attorney. My Father was deceased in 2008. He owed a line of credit loan in his name only but the bank did not file against his estate during probate period. My Mother assumed the payments but did not sign any forms making her responsible as far as I know. Can they file against my Mother's estate for this if she did not sign on the original note or if she never signed to be responsible? My Mother had a will leaving everything to me. In addition she had a Special Deed on her home and farms. They made it a life estate measured by her life and upon her death the remainder was to go to me. Does this protect the house and the farms from creditors? I don't totally understand the Application For Probate and Letters State of North Carolina form. Under the property of the estate it shows her household furnishings and a vehicle which was willed to me and I have now titled in my name. Under the property which can be added to the estate if needed to pay claims it shows our bank accounts and real estate owed by decedent and not listed elsewhere which would be the home and farms. Does this mean that I can still loss the home and farms in probate to the creditors although the will gives them to me? Sorry for being so lengthy with this post. If you need any more information please let me know. I am worrying myself sick over the possible loss of my Mother's home and farms which have been in our family for over 100 years. Have lost weight over the worrying and am now down to 88 pounds and I can't continue to stress over these matters. Thank you.