This is my second pregnancy. In my first I felt nauseous and tired all the time up until 14 weeks. I was so tired I would fall asleep at my work desk! This time it seems like I have no symptoms at all and only feel 'out of sorts' which passes after a minute or so. I'm very worried that something is not right with the pregnancy. Is it normal not to have any symptoms at all or is this something I should be concerned about?