I dont think there is anyone in the world who has died from smoking pot, and you arent going to be the first. I understand that you are addicted and it is going to be hard to quit but the things you mentioned would bother me enough to quit. I quit like 3 weeks ago and once you get past the 2 week mark it seems alot easier and the cravings arent as dramatic as they were before.

I will tell you about someone i know.
My friends dad has been smoking since he was 16, now he is 53 and still kicking. He smokes everyday and he smokes the good shit(well the best he can get)and his health amazes me. He has told me all the time that it is ok to smoke weed just dont revolve your life around it. I go by that when i would smoke and it makes me feel better about it.

I hope this helped a bit.

Also I am sorry about your mom.