Lizzie that weight gain is brilliant but I'm sorry your dd is struggling so much. I hope the meds increase will help, it's completely normal to resent the anorexia and your child at times for bringing it into your lives. It's so shit.
Complex well done on making the first step. Definitely start 3 plus 3 now, the Eva Musby book is useful on things to say when they refuse to eat, she's also done some YouTube videos. Basically though your dd only has a life if she eats (which is true in all senses of the word life.) No school, no exercise, no seeing friends, no going out unless she eats. It's pure hell but ultimately life saving.
We're slowly crawling to the other side of it now, dd is weight restored plus some and routinely eats 2500-3000 cals a day. Last nights dinner was a veggie cheese burger with chips and salad (which included a lot of avocado) pudding was an Oreo milkshake which was around 8 Oreos, a decent slug of double cream, ice cream and milk. She ate it all (bar the smallest amount) and enjoyed the milkshake.
It's still early days but I have that glimmer of hope that she will be okay and we will get passed this.
She's had upsets at school this week, lots of tears over a friend not being nice but I've not seen any pushback on the eating and I've felt this is normal teenage stuff rather than the ED stuff which is not normal iyswim??
Still lots to work on though including the fact that I still make and prepare everything she eats at home and the rigid rules she has around eating....
Anyway for those of you at the beginning of this God awful journey keep going, keep pushing food and hold onto the knowledge that your child is in there and really really hungry!! It's just the ED that doesn't let them eat.