Retrieving playlist and books I had prior family sharing

So about a month ago I wanted to share an audiobook I had purchased with my sister. So I decided to jump my family's family sharing account. I had my own account previously for 5 years, so had years of the playlist, and years of books.

But recently I had found it quite frustrating when it came to purchasing because now everything had to go through my mum's account resulting in me avoiding the purchase or having to send money to my mum just to finalise payments. in the end, found it useless to be on family shearing so I left. not realising that anything I purchased before joining family shearing would be gone too.

Is there any way to revert back to what I had before family sharing or even get back on to the family account before the 12 months limit in this situation?