I'm 27+2 and seem to be really thirsty this week - is this normal? I feel like I am downing water non-stop. I've also been really tired. I feel fine in the morning but by mid-afternoon all I want to do is sleep. I've had quite a stressful period at work recently which has meant that I've been overly anxious and crying a lot so not sure if I am just really run down or if it is something I should be more worried about. Has anyone had anything similar?