I’m 15 And I Feel Like I Might’ve Ruined My Life Over Something Dumb With Friends

I’m 15 and I’m pretty stressed and confused about this situation.
I was on a video call with two friends (also 15). During the call, one of them randomly exposed himself on camera on purpose as a joke with no peer pressure or nothing completely voluntary. I guess he was trying to go for a shock factor joke which worked we all laughed. This is where I really messed up. I screen recorded it without really thinking and later sent the recording to the other friend on instagram who was on the call.
Now my Instagram account got banned, and the message says the situation is being reported to NCMEC.
I know this kind of situation can be illegal even if everyone is a minor, but I didn’t fully think about that at the time and I wasn’t trying to do anything malicious. We’re all close friends and nothing was meant to be shared outside of us. The friend involved even said he didn’t care as long as it stayed between us, and it did. I know this doesn’t matter from a legal standpoint but
I’m now worried because I’ve never been in trouble before and I’m not sure what I’m supposed to do. I’ve seen that reports to NCMEC can sometimes be serious, but I don’t know if this is something where I should contact a parent or lawyer or if I should just wait and see if anything happens.
Should I proactively contact someone about this?
Just for context, I have never been in any kind of trouble before, I am a straight-A student, and I have always had a clean record. I am really worried about this affecting my future since I made a mistake and I do not want it to ruin what I have worked for. What should I do in this situation?

Edit: Thank you guys for the advice ever since this happened about a week ago my metal health has never been worse. I know what I did is wrong and I do deeply regret my actions. However I think it’s worth mentioning that ever since this happen my friend has sent more photos of his private part. I guess he has gotten more comfortable with us and decided to share these for some reason. Now these I did not save or distribute. I really don’t know what I should do. I don’t feel obligated to share private photos back and he has never pressured me too. I don’t know why my friend feels the need to share these but is it illegal to stay in the group chat?
Location: California