'I WAS EXHAUSTED AND TEARY FOR NO REAL REASON'

"I'd just returned to work after a long break bringing up four children. I loved my life, but was feeling exhausted, teary and down for no obvious reason. My GP diagnosed depression and prescribed antidepressants. This, it turned out, was a misdiagnosis.

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"I went to loads of different doctors who thought I could be suffering with everything from early onset dementia, depression and anxiety to irregular heart palpitations, psoriasis and arthritis.

I eventually went to see my doctor father and burst into tears, saying, 'I think I'm going mad. I don't know what's wrong with me.'