So, what does it all mean? A sleep expert offers her thoughts

Dr Nerina Ramlakhan, sleep expert and professional physiologist, says: “You’re a classic case of ‘Tired But Wired’ and need to read my first book of the same title. You’re stuck in a fatigue cycle needing caffeine to get you going and your ensuing lifestyle choices are keeping you stuck in this cycle and you end up, most nights, too wired to sleep.

“I want to help you to break this cycle and it is possible. This will involve making choices that enable you to live from the right part of your nervous system so that you’re able to wind down and sleep easily. Currently, you’re running in the sympathetic nervous system, which is responsible for producing the stress hormones (eg adrenaline) and your lifestyle choices are perpetuating this. No wonder you can’t fall asleep easily and your sleep is filled with nightmares and anxious dreams.”

“Why does it take me so long to fall asleep?” A sleep expert answers your questions