Hi MP,
I think it's totally normal to feel as you do. Sometimes life just gets too overwhelming, and we want a break from all of our responsibilities.
I'm not sure what options are available to you, but a time out sure would be good for right now. Is there a way that you can get away, just for a while, to re-center and relax?
You are in no way being selfish. No one can do it all, and trying to do everything without a break can wear you down mentally as well as physically. I wish I had more to suggest, I just wanted you to know I understand. I hope you can find some time just for you.
Love,
Sujin