Not to worry.
In the morning, put a recipe into the crockpot, go off to work and while driving home, think of a nice quiet place you have been..perhaps the mountains, brook or stream you have walked by...autumn leaf changes you have seen...Let the family serve themselves from the crockpot dinner. Eat your dinner and let everyone know that you are going to sew. No interruptions, no discussion of family problems,....Close the door, turn on some music and work on one of your projects.
Make it a small one, the next one can be that big project.
Even if you just piece a stack of nine patch strips, or half square triangles, or cut out some appliques....Lastly, don't feel guilty for these stolen moments of "your" time. You cannot carry the burdens of the world and your family discussions can take place at a time that is best for you...preferably in the morning and not before you go to bed. Think of those special peaceful places as you go off to sleep. Then, perhaps you will not feel so tired in the morning. Can you tell "I have been there, done that"..We all have..you are not alone. Now go and plan Your Day and enjoy your time.
D in TX