IMO, the most important thing to remember is life goes on, the living keep living, and no matter what happens you will be fine.
In the midst of losing loved ones and The Great College Chase, it might be easy to conflate the grief of loss with the stress of The Great College Chase.
My advice is you shouldn’t worry too much about going from 3.6 to 3.78 to 3.68. Those are relatively minor fluctuations. If you end up with a 3.6 or a 3.8 or whatever, that will be an accurate representation of your 4-yr HS performance, and none of those is bad.
Just as, after your uncle’s passing, you grieved then continued to achieve, please realize you will resume your achieving after your grieve for your aunt. Now is for grieving … you do your schoolwork as best you can, but you shouldn’t overly worry about not getting A’s during this time. We’re human, and sometimes what happens on one corner of our lives affects what goes on in another corner. It happens, and will happen in your future too. If your academic performance drops for a couple of weeks, so be it. Don’t pile extra stress over TGCS on yourself on top of your grief. Whatever you do over the next week or two will not have a significant effect on your 4yr GPA.
I’m sorry for your loss.