SS- that's a WHOLE lot of stuff happening all at once. I think anybody would be struggling. Hold on to your news and fragile sobriety. Guard it. You have an opportunity to do some real healthy emotional growing as long as you don't resort to numbing yourself with alcohol.
I do think this could be age related. Losing grandparents can be so very very hard and you are at the age when people lose them. And this is likely the first type of this kind of loss you are experiencing. It's hard. It gets easier. Years down the road you'll look back at people you've lost, relationships that past, jobs you've cycled through with more wisdom and understanding. And you 'll have a more secure understanding that life happens and that you have the ability to handle the chances and power to embrace the future.
Hang in there honey. You are doing great! !