You should tell her about the move, if my daughter just up and left I'd be so crushed wether we were fighting or not. I understand about waiting to tell her you're pregnant though. Best of luck regardless of your choices!
Ya I think you need to tell her before moving. At least so she is aware. She may decide to come when baby is born if you want her to and with it being her first grand baby I am sure she would want to be there.
u gotta do what makes u happy! dont worry about how she feels its not about her. but i think u should tell her b4 u go, it might make things easier on u n she might stop fighting with u.
n she might understand u moving, but either way dont stress urself bout it do what makes u happy