I have been suffering from insomnia for about two months now. Some weeks I get decent sleep and some weeks I struggle to get any sleep. On the worst days, it takes me about two to three hours to fall asleep and then when I do finally fall asleep I wake up on average six times in a night. Sometimes when I wake up I could feel my heart racing. I went to my doctors to recommend a sleep study, but he said it was not necessary. I got my blood tested and the results came back normal. I am very puzzled to what this could be. Any thoughts???