Technically at least from what I understand, all sex with minors is prohibited. That includes minors with minors that is consensual. People don't usually go that far to pursue those cases.

There is a law on the governor's desk in California that would prosecute viewers (not makers and distributors) of child porn. That is how seriously people take this issue. The risks for abuse and trauma are too great. In fact, sex with a minor is considered abuse regardless of how the minor behaved or reacted.

While I am not sure I agree with all of this and am certain I disagree with some of it, that is what the law is.

As far as resources there must be something. I'll take a look. If there truly isn't anything it is perhaps because a minor reporting something would require legal action and therefore there aren't places where a minor can just go to get support without certain actions taking place as a result. Just a guess.