I just read that using the bath water stream to masturbate can cause an air embolism. is that true. im embarrassed and scared im going to die ?

Unlikely: An air embolism is unlikely to occur unless the air is compressed or if air enters a vein or artery during a medical procedure, such as an iv catheter. Air embolism is a concern for underwater diving. Considering how many people are exposed to bath water stream, this would be a common occurence if your concern was true.

Take it easy!: Agree with Dr. Cress: You are not going to die from masturbating with a stream of water. Have a healthy diet, exercise, drink plenty of water, have safe sex, and get HPV vaccine. Wish you good health! Nutrition: http://www.choosemyplate.gov/.