1. Collect the certified copy of the sale deed of the said property from the local Registration office to be sure what has been written therein rather than remembering some thing.
2. After collecting the copy of the said sale deed if you find that your share being a minor was sold by the sellers without taking the approval of the District Judge, then you can file a partition suit claiming your share in the property which was illegally sold when you were a minor.
3. Engage an experienced lawyer having expertise in this field.