Will I get in trouble?
It’s important to remember that this law is in place to protect you, not to get you in trouble. When deciding what to do, the police will consider a few things, including: age difference, consent, power imbalance, pressure and intentions.
If images are shared between two people of a similar age who are both under 18, and they were shared with consent within a healthy relationship, it is unlikely that the police would press charges against either of these people, although it could still be recorded.
If someone threatens to share a nude of someone else, they can get in trouble with the police, even if they don’t do it.