Mom passed executors are not allowing access

I recently lost my Mom..I am not an executor??Anyway my sibs will not allow me access to her home at all.. They changed the locks unbeknown to me. I spent a lot of time there because I am single and mom always even 3 mos ago gave me keys They lied to me and said it was in the will. I want to go home w/o an audience. What should I do??they claim no-one goes in but they are and these two spent very little time there as matter of fact my Bro executor hated my Mom so did his wife who is cleaning MY others stuff she has no business cleaning anything. My brother is the executor she/wife did not like my Mom nor did my brother. Mom picked him and a sister who was oldest. I am required to ask permission to go home to say I'm angry is an understatement.
I asked to all not to move Moms things but of course they have. No autopsie I need help I want to know what happened. Yes she is gone my heart needs info.Do I need legal help? there is property and a house jewelry is missing? I have no access why?