might/may

[Over the top]

"I might be seventy-five years old and my shoulders might feel as if they are attached at the joint with fish-hooks, but the new kidney they grew me is still processing fluids just fine, thank you" From a novel called A Friend of the Earth by Boyle.

Why does the author use might not may?
I have learned might expresses strong doubt and I don't think he doubts his age or what his shoulders feel?

Why does he say grew me not grew in me?

Thank you

[freezeframe]

might...but

spoken


used for saying that although something is perhaps true, this does not change the main fact that you are stating

Armstrong might not be a great player, but he’s a good captain.

This might sound crazy, but I think someone is following me.




or as Happy Bunny would say: "I might be psycho, but I'm cute"

[Over the top]

Thank you