Hello, I've Been Having A Hard Time Sleeping For The

Hello, I've been having a hard time sleeping for the past 4 months. I can go days without sleeping and when I do sleep it is only for a few hours yet I never feel tired or sleepy. I really miss my sleep and I don't know what is going on. I do have Grave's Disease and a history of hyperthyroidism for the past 6 years but I never developed insomnia until May of this year. Can the insomnia be attributed to anything else? I have been tested for other illnesses but I am a pretty healthy 27 year old female, 5'3, and 150 lbs.