Yes. Completely normal. You just had major surgery. Give it a minute :)
It's normal and it does take alot out of you. I've was completely wiped out and could not get started to save my life. I dragged butt for awhile.
It's definitley normal to still feel tired.
You did have major surgery. . .it takes a while for your body to adjust and heal.
Jot down all of what you're feeling, so you'll remember when you go for your follow-up with the doctor, but the most important thing is to rest and be good to yourself.