as long as she's eating and gaining weight I wouldn't worry ……. not really familiar with weights of turtles , I just can tell when they feel light , heavy or in between ……. the vet weighs sick ones I bring in ….. I just brought in an almost 4" blandings turtle and it weighed 113 grams , it doesn't feel excessively light to me , so I think at 2.75 and 111 grams she probably feels pretty heavy ?