did grief change your brain?

does anyone here feel like grief made them stupid? i was so brilliant once upon a time. straight A student. full ride to a top law school. then my dad/stepmom died unexpectedly in the same year and i just feel like i never got back to who i was. i feel like the trauma of grief fundamentally changed my brain even though it’s been 4 years now. i’m not getting any better. i still feel so haunted.