hi with my first pregnancy i too had no symptoms atall, tiredness much later on, but at your stage i was perfectly fit and healthy and kept wondering when i was going to 'feel' pregnant, this time however i have all sorts of complaints. i know its easy for us to say, but just enjoy it!!! if it is really taking over your life worrying about it why dont you phone midwife or hospital even just for reassurance and they may give you an earlier scan. they will absolutely not think you are wasting resources or anyones time, they will completely understand, im sure they will be very helpful and you will definitely not be the only on with the same concerns, take care x let us know how you get on if you phone x