MM, you are NOT the worlds worst mum!!! It is really hard to function on very little sleep. W still wakes 2-4 times every single night. Luckily for me though he just has a feed and goes back to sleep. I find myself vague just coping with that, don't know how I would get by if I had to stay awake longer than a few minutes. I really hope the antibiotics kick in soon and she starts to feel better.