Dream interpretation: i dreamed that i died saving someones life?

first i dreamed about hanging out with this girl that i hate but pretend to like. she smokes and my worst fear is to start smoking because my lungs r wats going to kill me in the end. but in my dream i started to smoking and stealing money out of this girls bag. then i was walking down a street and i was still smoking then suddenly it was like a ton of powder entered my lungs and i couldn't breath. i gasped for air and then layed down on the ground but no one helped me. i woke up in a church sitting in a chair. i got up and suddenly had random flashes. there was a young girl with blonde hair and her bak was bobbing in the water. i shook the flash off and just kept walking to this old guy who i knew. but the flashes came again: i swam over the the girl and picked her up shaking her trying to wake her. i then sat down next to the man he looked at me and said "u r the luckiest girl i have ever met!" i asked "Y?" "you dont remember anything?" "no..wat happened? i remember a girl that looks like shes drowned but that's it" "yes u saved her life! but you didn't make it..." "WAT DO U MEAN I DIDNT MAKE IT!?!?" he stayed calm but didn't look at me. he just stared down at his hands. "you..died, victoria" "BUT IM STILL HERE! Y AM I STILL HERE IF I DIDNT MAKE IT?" "God gave u another chance" but i interrupted him "Buddha! Buddha gave me another chance!" (i go to a christian school but im buddhist) "alright" "what happened to me? how did i die?" "after u died the doctors did tests on u. u have asklfkdklsj" (cant remember wat he said)" "wat does that mean?" "it means u get short of breath very easily. u gave all ur strength to save that girls life but when it got to saving ur own u didn't have any left and u were out of breath." "so im still going to die from aldkjfeiek (dont remember sorry)" "eventually." i burst out into tears "YOU DONT KNOW WAT ITS LIKE TO HAVE THIS TIME BOMB IN U!" he didn't say anything but afew minutes later the priestess came up to the front and started preaching. "we have alot of ppl in this world. there r the ppl who die with regrets, die with contentment, and there r those who postpone the final judgment." she then looked at me and smiled then i woke with relief.