@Broken heart,
Use it as a learning experience. There is not much else you can do.
Don't sleep with people you don't know very well. Don't send nude pics unless you have perfect trust in someone - and perfect trust does not happen overnight and it does not happen when someone pressures you. Don't sleep with two people who are siblings as they will inevitably talk.
Try to salvage your relationships with your friends, if you can. You were young and did dumb things. You need them - but you are also willing to help them if they have troubles. You can't just lean on them. There has to be a give and take in friendships. If you can't salvage your friendships, then eventually make new friends.
And, thank your lucky stars you didn't come out the experience pregnant or with a sexually transmitted disease, and try to move on with your life.