I am a gay teenager. ok i was experimenting with a dildo. rounded not sharp. i feel kind of weird can this puncture my intestine and can i die?

Unlikely: Thank you for reaching out about this. While it is unlikely that a dildo will perforate your intestine, signs of perforation could include abdominal pain, rectal bleeding, and a fever. If you experience any of those, go to the emergency room and tell them what's happened. It is important they know what happened. In general, it's wise to use lots of lube and only toys with a flared base.

Possible: Any anal sex toy is not without risk. Usually punctured intestine would manifest with bleeding and pain. Not sure what you mean by "weird". I strongly recommend that you not use sex toys in the future in order to avoid unnecessary injury to your intestines and rectum.