I’m with kmakm,maybe get your iron levels checked. You lose a lot of blood during surgery and it can take a month or so to build levels back up.I can remember being overtired for at least a month or so post op.Ofcourse sleep deprivation doesn’t help either. Ever since bc treatment and menopause,my sleep has been crap.I go off ok and get about 4 good hrs,wake up at 3am and then it’s just rubbish sleep after that .Surprisingly I seem to manage on it- some afternoons I’m really tired. Go with the flow and have a nana nap if you need to.
