Hi there,
I'm glad you have some friends to help you at this difficult time and your parents are there for you which is definitely a help to ease your pain.
There is no right or wrong. We all try our best to help and save our loved ones. Do not feel guilty, think of good times you had together, you will cherish those memories. Though it's too raw for you to think anything else at the moment. One step at a time.
It's four months two weeks since my precious son passed away so sudden, so quick, life is cruel. Will be starting my work soon, as I worked for a month as a Phased Return. I have understanding manager and colleagues, works helps me to distract my mind, even though I cry everyday despite my families and friends support, I feel so empty, sad.
Take care, look after yourself
big hug
Ash x