Basement drain backing up
Hello, my name is April. I recently purchased my house almost 2 years ago,(house is over 50 years old, I think) I learn 3 days into moving into my house that the basement flooded. It was due to a heavy rain fall but shortly after that the drains would back up in the basement, like the laundry room, bathtub anywhere with a drain. We used a snake the first time and went 100 feet out and the problem disappeared. Now almost 8 months later the problem has come back, worse. Every time water is ran it backs up in the basement. It consists of t-p and lint. My father in law had his done years ago and he said it could be the old clay pipes cracked and so the drain outside is no longer aligned. I am so scared I have no idea how to know and if I call a plumber I feel they will take me for all I am worth. How do I know, and the cost, time and if I can remedy through myself, please let me know.