Every night for the since mid July I have woken up and not been able to get back to sleep. I am constantly tired and starting to feel quite down. I am normally a happy, positive person but the thought of feeling like this for the rest of my life is depressing me. I have cut out caffeine, I don't drink excessively, I am not worried about anything, I exercise 3-4 times a week, I don't use screens in the evening, I eat well. I just don't know what to do. It's starting to effect my concentration at work and I sometimes feel dizzy. I really need some advice on how to tackle this or tips on how to get back to sleep.