Now ive read several places that being overly tired during the day is a common symptom of pregnancy, and ive also read that some people get it before they miss their period.

My girlfriend has been more tired over the past few days, but not exhausted tired, just tired. However she does work outside and with little kids all day at a girl scout camp and it has been 80-90 degrees outside. So I think its just the fact that shes tired from work.

But my question is, if it is a symptom, is it being just more tired than usual or exhausted all day?

Also about how early can people start to feel other symptoms like tender breasts and such?