car turning off while idling (?)

i made a post before , thought it had been fixed but on my way to work it turned off on me at a red light .
i have a 2014 nissan sentra automatic very basic model , 131k miles on it . so far i have cleaned the MAF sensor (not replaced) , replaced the fuel pump . i was working after my father did some more tinkering with it (not sure what he did , i'm sorry) and was driving fine . i go to go to work and it was driving fine until a minute down the road i was stopped at a red light and it shut off . i tried to restart it a few times and it would shut off again as soon as i turned it on (that was the initial problem i was having before i cleaned and replaced parts) . after sitting there for a few minutes and panicking i turned it back on again and i had a green light so i just went ahead and drove fully to work but i guarantee it's going to do the same thing to me again when i drive home from work but i'll only know for sure when i get to driving it . so , does anyone know what else i can do to fix this ? honestly it's giving me so much anxiety i just want to save up for a new car but i don't have the money to do that right now so ... gotta do what i can to make it work for right now . thank you !!