Female Rights

I am a 39 years old woman. Married and no children. I have a brother who is two years younger to me, two elder sisters and one younger sister in total five siblings. My mother is alive and father passed away in 2000. Our properties/property was grandfather’s accumulated, which was passed to my father and he suddenly passed away. However within 3-4-5 years of his passing my brother, and mother sold the property. They took us to the registration office (I guess) and got our signature. After that they brought a new house. I never read the document on which they took our signature (all 4 sisters, who were married at that time). I know for sure it was the resdidential property where we grew up. We also have a commercial property. I want to know if at the time of signing at the office where they took us, did they take our signature on all property documentation or just one? And if at all I have signed on all property documentation if I still have any right? Also, what if I signed only on one property documentation what is my right? I feel that my brother got my signature on one or all properties, in any case can I have access to the documents I have signed? And if yes where can I get the access from? Also, if I have already signed unknowingly on all or one property document what is my right? I got married in 1996 October. May you please tell me my rights and how do I go about claiming that right and what are the chances that they cannot say that I do not have any right? Being an educated woman I know for sure that I did have an equal right on the property left by my grandfather in the absence of any will left (my grandfather did not leave any will) at the time of signing the document my brother only gave me 1,25,000 Indian Rupees. Now my brother has two daughters, my point is why should I suffer and struggle in life when I have/had the legal equal right as my brother and I unknowingly signed all the documentation him and my mother wanted me to sign? I am sure that the residential property which was sold was under HUF, I am unsure about the commercial property. Where can I find the if the commercial property is also under the same HUF? And what happens if as a result of four sisters (us) signing the document resulted in giving my brother power of attorney to do the appropriation of property/properties as he please?