Insomnia

Anybody else have terrible insomnia? I am just short of 6 weeks and this is currently my most frustrating symptom. I am passing-out tired at like 7:30 pm, but I sleep for like an hour and then struggle to sleep all night. I have a pretty physical job right now, teaching swim lessons for 6 hours a day, and it is extremely difficult to make it through the day when I struggle to sleep at night. I am not sick or anything at night and nothing specific is keeping me up, I just cannot sleep. The only times I feel tired are during the day when I do not have the option to sleep.