My parents made a will together, inheritance split equally. Mother died, my siblings wanted her assets and trust, excluding me.

My siblings have made me a scapegoat. Lied many times to my Dad about me. Talked Dad into making a Trust instead of following Mother's wishes and his, before the lies. They now have full control of the money, will not give me any of the information regarding the amount of Dad's assets. They have told me I am no longer their Sister. I am sure Dad did not know the details of the Trust. My siblings changed it twice, now they can use his money anyway they wish, there is no penalty for losing the money. They have advised me that they will give me no information, I no longer exist. The Trust states after my sister dies (she lives in parents home) the monies will then be divided. I am disabled, have a lot less income, and I am sure that all the assets will be put in their names and I will receive nothing. Supposedly the home was to be sold after my sister passes (Dad thought) but the revised Trust says they can choose not sell the home, but rent it. My sister and her husband and have lived with my parents 5 years - Free. All expenses for the home, taxes, utilities, etc. are to be paid out of the Trust. However, the last 2 years Dad has needed a lot of care. They say I did not care for him, during the last few years and therefore deserve nothing. However my husband and I took care of my parents 15 years before my siblings moved back to the area. We Visited with my parents at least one entire day a week, did all repairs, etc. After Mother passed, I called Dad often but have not visited at his home very often because we were never allowed to visit. My sister took over the conversation, never allowed us a minute alone with Dad. They made it clear we were "intruding". We did offer many, many times to change houses and take total care of Dad giving them a break for vacation, or live in our home and rest. They never would let us, yet say they "gave up years of their life" caring for Dad. Question: If I took my siblings to court would a judge revoke the Trust and go by the original Will, like Mother wanted, or is this a lost cause? I have lost both parents my siblings (we got along fine before) and my inheritance. I do not know whether to get a Lawyer or just let them have everything. If I were not disabled, doctor bills, medicine needed, and 66 Years old, I would just let them have their way. But, I cannot do housework, must hire help and the inheritance would greatly improve my standard of living. Any suggestions? Joy,