I was nauseous with my daughter but that is it, from 6-12 weeks on the dot. This time I've been doubly nauseous, major headaches and just felt a whole lot worse. It's only nearly week 7 and I've felt like this for 3weeks. Therefore everyone keeps saying Im having a boy! Will let you know at week 18. If it's not the sex, maybe it's older age causing the sickness. I was only 23 last time.