Hey there and welcome to HealingWell and the A & P Forum. I am Kitt.
I understand how isolated you must be feeling, but perhaps it is time to tell your Mother and any other family members that you cannot be the only one to care for your Grandmother......... No one person can be on duty 24/7 without some relief.
With your own Health Anxiety issues you need time for yourself.
Please remember to not over think your sx, but try to stay in the moment...............if you feel you want to see a physician you need to do so.
Here is a great resource for you:
The Anxiety & Phobia Workbook, Fourth Edition
Pass Through Panic: Freeing Yourself from Anxiety and Fear
by: Claire Weekes
You can order it online and if you look to the right you will see our resources links here on HW. Amazon.com has a large selection of self help materials...........you will find they are listed in our resources.
Take care and stick with us.............you are family now.