My advice? Just go with the flow, fighting it has a way of backfiring badly...

When my brother suddenly died, I'm pretty sure I fell off my rocker and broke it in the process. I was unstable as all hell. Buuuut, in my defence, that was a few months before being dxd and I didn't even know wth I was dealing with. I'm sure that had I known, I would've taken better care of myself. All I knew was that the stuff (episodes) I was battling, had suddenly become larger than life.

3 short months later, just as I was emerging from a rage filled psychotic depression and in the process of being dxd, my dad died.

The earth caved beneath me, but instead of batshyt crazy like before I was mostly just numb...

So I had 2 very differing grief reactions in a very short span of time.

Anyway, the point of all that info is this:

Constantly trying to frantically hold the pieces together isn't always the best way to go. Especially not with grief, it has to be experienced and processed somehow, and it will claw its way out of you eventually.

Cry when you're sad, scream into a pillow when you're mad, but DON'T deny yourself the right to feel your emotions on the account that they're larger than life. They're still valid, they're still real, they still need and deserve to be felt.

Best coping mechanism I had?

Sharing old "Remember when" stories with friends and familiy. My dad was no saint either, sometimes we spoke about his temper and I even b1tched about not knowing how to feel about him post mortem on here.
So its not that I pretended he was perfect and only focussed on his good side, its just that talking and mostly the joking about him helped us process as he was big on (his own dry) humour.

So yeah, don't fight what you feel, they're as valid as anybody else's feelings.

My sincerest condolences to you and your family, feel free to PM me anytime should you want to chat one on one.