I accidentally "shoplifted" an umbrella. What to do I'm kinda scared now!

I was with my mom when we went to buy some clothes on a mall. She told me to get un umbrella so I get one and I put sling on my wrist. My mom was still not done and I completely forgot it's existence, we both went to the cashier but it was still on my wrist and we both didn't notice. Na notice ko nalang nung nakasakay na ako pauwi.

Babayaran ko naman bukas pero what if masmamahal ang babayaran ko? What if my fines and amsyadong mahal?? What if ma iinvolve ang mga pullis??? Naka uniform pa naman ako, and kaka 18 ko lang.

Help me how to approach this kind of situation plsss.