Can you bill an estate for elder care once the parent has passed?

I cared for my mother for five years in our home. I dispensed her medication as well as her insulin. She offset some of her expenses for special needs like depends, and personal care, some specialized food for her diabetes, but it was no where near what it cost to care for her full time. My siblings could not be bothered for those years nor did they come to visit her. Now that she has passed they have taken over the estate. Because they join together I am left without any recourse other than to go along with what they choose to do even when I suggest otherwise. I feel like the reason they have any inheritance at all is because I always stayed within her budget and took out of my own, rather than spend her money, or ask to be paid for providing full time care for her. Providing full time nursing care would have cost approximately 200.00 a day. I would have gone through her whole estate by charging her just within the first year alone. I can't seem to get my siblings to understand that fact and they act as though my services were worth nothing. Actually they don't even acknowledge that I did anything for those five years. Now that she is deceased they have come out of the woodwork to center in on her money and are suddenly oh so helpful. It feels like a slap in the face. Would love to know if there is anything I can do. I really don't want any money for the job provided, but would love to make the point that the inheritance is there because she was taken care of with minimal taken out of her pocket and that the services provided were worth more because they provided her the opportunity to be in a home environment where she was loved and she thrived.