Hi Mumsnet - I had been feeling extremely tired and just put it down to being a new mum. But DS was six months! So had some blood test done and was told last week that my thyroid is running very low and that I must start Thyroxin straight away. It started last Thursday and initially felt a lot better but today I have been feeling v down which is just not me and I am beginning to get v anxious about not giving the little one my best. My memory is awful too. Has anyone experienced this - feel like I'm on an emotional roller coaster and trying too hard to be the perfect mum but just feel like sleeping all the time.