The day I learned not to measure my own beauty and self-worth by others' reactions is the day I began seeing myself in my best angles and light. So post away, lovers of thy selfies, and make no apologies. Love who you are and everyone who cares for you will continue being additions to the love you already have for yourself.
Being the best caretaker, mom, dad or friend doesn't mean it's always about putting them first. The nice girl will live her life for others then wake up one day and wonder where her life went. If it fuels you (and you can tell if you feel awake and alive vs. tired and sluggish) then do it. Otherwise, it's time to let some of it go. Make arrangements for help and then use that free time for things that do make you feel alive.