Hell yeah it does!
My brother has been gone nearly a year and I am just now getting back to my previous self! It‘s been like carrying around this weighted blanket that drains me completely of energy and focus.
I don‘t remember this with my dad - but I had two young kids when I lost him and being a mom was exhausting. So I probably didn‘t realize. My kids were five years older when I lost my brother so that may be the difference.