DD 13 always had a good appetite; was fit and a healthy weight.
However over the last few months I've noticed she's become fussier with meals but eating lots of snacks and junk when she can get her hands on it.
Tbh I haven't had much time to think about it or ensure we sit down to family meals as both DH and I have been working erratic hours and my DM has been ill.
However things seem to have escalated since returning to school. The canteen is closed so students are required to bring in food. DD flatly refuses to take a packed lunch so we have been buying a pasta salad/sandwich from the local shop. However yesterday she told me that she's been throwing the food away as "not hungry/don't want to eat in front of people" and today told me that all she would eat is a small tube of Pringles 
To make matters worse she is also refusing to eat any kind of breakfast so she must be in her knees by the time she gets home, but even then only eats a small amount.
I am desperately trying to not make a massive deal of what's happening and treading carefully; so many changes going on at the moment, back to school, hormones etc but inside I have a huge knot of fear. Am so worried this is the start of an eating disorder but don't know what to do.