DD(3) has had a hard, pea-sized lump on her neck for a good 3 months now (since we discovered it at least). Been back and forth to the GP who just says it's a lymph node every time and only come back if she has other symptoms or if it gets bigger in size. Unfortunately, last night we noticed that it's gotten a little bigger but she hasn't been unwell this time. I'm extremely worried. Does anyone know what it could be? She's absolutely fine, the only thing that's now playing on my mind is the fact that she seems to get a lot more tired during the day and tends to need a nap when she stopped having naps a while back. The lump seems to be movable.