weight gain help

Hi, i’m 16 and i am currently 26 weeks pregnant. Since the beginning of my pregnancy i have gained 17 lbs. Is this too much? I feel like it’s way too much. I feel horrible about myself. My face looks really chubby compared to what it used to and my arms and legs look much bigger. Can anyone share their experiences and how they dealt with weight gain? I’ve struggled with anorexia in the past and i feel like this is going to bring it back. i try to tell myself this is for my baby and i can lose the weight after but what if i can’t? any tips?? thank you!