my 2 year old daughter has been unwell/not herself for about 8 weeks now. she is very pale has dark circles under her eyes lethargic, some days of her food and irratable. every couple of days has a low grade fever , i just cant get to the bottom of what is the matter with her, she s lost her little spark and is always tired, i am very worried it may be something serious. she is getting her bloods cheched on monday but i am wondering if anyone can give me an idea of what might be wrong with her, thanks