My daughter has gone to bed tonight complaining about being cold. Her dad/my husband has a nasty cold at the moment but it is just a cold and not flu. I took her temperature when she had just fallen asleep and it was 35.7 and I have just taken her temperature again an hour later and again it says 35.7, usually it is at 37.5. Should I be worried about a low temperature? She seems to have no other symptoms apart from saying she feels cold.