I agree with Soliaree, you need to look out for yourself first. It's not selfish just very necessary to survive.
It is so easy to assimilate the negativity of those around us when we are run down and over extended. This seems especially true when our own family is involved. Without the support of your siblings the weight of your responsibilities becomes more intense.
While probably not as good as face to face therapy, if you have been able to find solace and support here that's a good thing.
Would you please say hello to the real mountains for me. The highest thing around here is the local landfill. I miss the eye candy and clean air the mountains have to offer.
I wish you the best of luck