Hi, this is my second pregnancy (I have a boy of 4.5) but I just seem to be thinking of the worse case scenarios all the time. I've had my 12 week scan and all was well. I'm having dreadful morning sickness and headaches but all in all everything is OK. I just keep having the most dreadful daydreams about something going wrong and I can't get it out of my head. Am I alone?