Options to extend a bereavement leave?

Hi there,

I just lost my father suddenly a few days ago and I will be taking my 5 days of bereavement leave. My mental health is not great right now and I know I need more time to process everything, grieve properly and also handle the estate. My mom lives outside the NCR and she is not coping well. I worry about her being alone and falling into a depression if I head back home too soon.

I have some sick time but not enough to give me a few months off. Could I request a 3 month LWOP, in a situation like this?

What are some of my options, without using up my vacation days? because I’m sure the grief will hit me throughout the year and I’ll need some banked time to step away.

Thank you in advance.