Re: Night away from EBF baby at 4 months?
The general rule is 1-1.5 ounces of milk per hour mom is gone. You may need more if it's going to be used for comfort. I'd also leave your mom a tshirt or pillow or something that smells like you so he can maybe feel like you're there. And maybe have her come over more often in the next couple of months so he can get used to her. Maybe even let her put him to bed. And you'll want to bring your pump that night and pump every few hours so you don't get engorged or hurt your supply.
It's your instincts kicking in making you nervous. It can be done, and in the case of some working moms it can be done successfully. But honestly, I wouldn't leave a baby that age all night unless it was really necessary. He's so little and there's no way for him to understand, since it's a one-time thing and not something he's used to. He's probably going to have a rough time, and so are you. Can you just take an evening to yourself? Or leave later/come home earlier? Will you be able to run home if grandma calls and says baby is upset or she's run out of milk?
“We are not put on earth for ourselves, but are placed here for each other. If you are there always for others, then in time of need, someone will be there for you.”