Why don’t you care for yourself now? There won’t be more time later or less people to care for later, you won’t ‘deserve’ it more later, you won’t have a more perfect life or a better plan or stick to it easier. There will always be laundry to do, dishes to clean and toilets to scrub.
Care for yourself. Now. Take 5 breaths into the back of your lungs and fully exhale each breath. What do you notice?