You will get it and don't worry.

the health of your family member is the most important thing.
Try not to worry about the things which are beyond your control.
You will get the card eventually. As a matter of fact, I don't see anyone around me who didn't get GC after I485 was filed.

If possible, you may try a perm EB2. Then you can carry over the EB3 PD.

Good luck to you!