I think you got a lot of great tips and have a lot of fine ideas so I won't elaborate on that.
What I do want you to be careful of is going too far in the opposite direction - yes, I think it's a great idea for you to gain a hint of weight (and you'll probably gain it in the form of fat) but what a lot of people do is go to the other extreme. What you're trying to do is like tuning in a station on the radio - right now you've cranked the dial too far one way and all you're picking up is static, you want to turn the dial just a tiny smidge so you're picking up NPR and NOT so far that you're back at the middle of the dial. The dial is super easy to turn and very easy to go too far, so use a light hand.
Your body WANTS to get pg and it will shoot out an egg as soon as it thinks a pg is viable.