Am I a wimp, or does everyone feel pretty overwhelmed by having a full-time job and trying to do literally anything else?

I am so. Overwhelmed. I’m 37, married, 3 pets, no kids, decent income, no big health issues, but DAMN! Working full time and having a household and a spouse feels like literally all of the brain space I have. And I don’t even have kids! (I am a full-time nanny and household manager for a HNW family of 7 though, so there’s that…) Anytime I try to do something “extra”, like join a choir or keep up w friends or start an exercise routine… within about 3 weeks I feel like I can’t keep my head above water. Right now, we’re planning a move, and I’m having heart palpitations on my way to work. Is it like this for everyone?? Help!