In the space of about 1 month I lost half a stone for no apparent reason, so I turned to the internet to look for reasons why this might be.
Overactive thyroid is one of the things I came across so I looked into it more and some of the symptoms ring a bell; Mood swings, Sweating, Tiredness, weight loss regardless of increased appetite, sleeping poorly, shaky hands (sometimes) and that my heart occasionally feels like it skips a beat.