Not married by church

So the other day me and my sisters somehow got into the conversation about marriage. My 2 sisters are all married by church. One of them started saying how I was living in sin because my marriage wasn’t blessed by god through a wedding ceremony by church. I am married legally to my husband of almost 11 years and we only got married by law not by church. So Ive always knew that in the bible it states that we should be married by church but now i feel like i should so I don’t live in sin?

We are catholic and I would love to get married by church too we just never got to it.