My 25 Year Old Handicapped Son Passed Away On 9-11-18.

My 25 year old handicapped son passed away on 9-11-18. He was a heart patient that was not expected to live through 1995. His tummy started bloating a bit and was difficult to pull air off through his gtube. All the sudden after being fine all day, he threw up and they said he quit breathing. Obviously CPR was unsuccessful. They tried to intubate him and could not. After he passed, i was holding him and rocking him, his tummy was absolutely enormous like i have never seen and a brownish coffee looking thick substance began coming out of his nose. What caused this? I do not have his cause of death yet because the doctor left before i seen him! Death certifcates will come Monday with the cause stated!