Is this normal?

My exNH tells me I had no right to go to his home uninvited.. We have been separated 4 mos and while back he gave ST so I went to his apartment .. To be told I am crazy.. I am so confused that I am starting to believe I am crazy! I cant stop thinking about how Maybe he is right .. Maybe I am crazy. But in a normal relationship would it be okay to go to your husbands home uninvited and knock on his door? I don't even know what a normal relationship is anymore!