@Jacqui23
It's normal for this to happen whilst the phone indexes all files and organises itself.
If it doesn't settle down in a couple of days then call O2, but I'm sure it will be fine.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion.
This is not Customer Service so we are unable to help with account specific issues.Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)