How do i end a family curse.?

i need help. my whole life, our family has joked about having a family curse. we are good natured and good hearted people that help others. it has been our experience that to be such kind people we suffer so much in life. illnesses, financial issues, love issues. i have always known that my grandfather was native american, you can see it in the photos. dark skin, dark hair 100% Cherokee. my sister tried to do a family tree but is unable to trace our lineage beyond our grandfather. my sister has said that when she was younger, our mother had a conversation with my grandfather and he told her that because of problems in the tribe and hard times during very racially tenuous times that he thought it would be best for the family to change his name in hopes of finding a job easier. that said, he requested of another Caucasian family to adopt him and his brother and take on their last name. my father refuses to believe that story, but my mother swears that my grandfather swore that he never told anyone especially his children what happened. he was born in the 1880's and times were harder and different then. i see the indian descent in my family members and my father says that he is sure his father was full blooded indian, which confuses me. i guess he doesn't want to believe that our lineage and heritage could be cast aside so haphazardly. i think it is a pride thing. while we still have a last name that stems from a name similar to a tribal name (profession linked, such as blacksmith, or taylor or boatswain) i don't see where it made a difference in helping but perhaps because it was the last name of a prominent and well known Caucasian family it was more easily accepted. my grandfather has long passed and my mother cannot remember what he said his original last name was. my sister and i believe that in doing so, my grandfather upset the spirits and have cast negative energy down the line. all who share his last name have suffered. many family members have committed suicide. in most cases they went from fine to crazed without any indication. the suicides were not telegraphed in any way. all were shocking and sporadic and without warning or justification. houses have burned, illnesses evolved. once my sister married, her luck has changed. her children lead a good life. for instance i have struggled all my life to become something, all that i wanted to do was difficult or unachievable, however, my nephew, who has different last name followed in my footsteps and is like a carbon copy of me. and his life has been an easy road. it is like he is what i should have been and the spirits have blessed him to show their anger. i would go into more detail, but i wish to keep some level of privacy because i don't want to risk losing the job i have now, or be frowned upon at work and thought to be crazy. if any one can offer advice or a solution it would be greatly appreciated. i have played music for disabled kids, given stuffed animals at christmas to sick and terminal children, have helped the homeless and many other charitable acts all done unselfishly and most done while still an innocent child. age 13-19. the homeless man that i made a care package for christmas was never seen again so that i could give it to him. we later learned that he got drunk and fell off the curb and was hit by a car and later died of his wounds. he was a classmate of my uncle. the same uncle was to marry and while his fiance was out shopping for a dress she was hit and killed by a bus. he never dated another woman out of his love for her. too many things are too coincidental to not have merit. but i have no knowledge in what to do to remove this curse or whatever it may be. i am doing this for my entire family and future generations and not as a selfish act. unfortunately the state that maintains records will not release any information about my grandfather. all i know is he is of a north carolina indian tribe and was well respected. but i am sure that once he turned his back on his heritage the tribe turned their back on him. his intentions were good because the tribe was gaining stigma for causing trouble and for being undesirables. he only did what he thought was right for his family and lineage. i am sure that if he knew the consequences he would have done differently. from what i know this is as accurate as i can explain to you in order to get the help i need. and i know that my grandfather was a great and kind man. for example if someone asked how was his wife and kid he would get insulted and ask them to leave saying that you do not disrespect my family. he would say my wife is fine and my children are fine. but i do not have kids. goats have kids. and all of my family that i was able to meet would give the shirts off their backs and never asked help from anyone. i guess other than my grandfather asking for the help at a fair shake on life.