Hi everyone! I'm new in this forum. Would like some opinion or if u have experienced it. I'm in week 16 of my first pregnancy. My nausea started to easen up, but I get tired easily and sometimes headache out of the blue. I'm not sure why.. Last time I checked the levels of iron, etc are ok. And I'm not doing any heavy physical work. Maybe just walking around a lot in the city sometimes. Is sleeping late affecting? Or is there something more serious that I should be aware of? Thanks everyone..