If you are tired then maybe go to your Practice Nurse or GP for a full blood test, i.e. thyroid function and anemia can cause tiredness. I remember my Mum having crashing fatigue which in hindsight it must have been menopause related.
It's "The Change"
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Have a browse round. Make notes.
Tell us more about you; your age, exercise regime, some find it helpful to keep a mood/food/symptom diary.
