Eastbound - you aren't alone. The first couple weeks were horrtible for me sleep wise too, crazy dreams and nightmares, not much of any kind of sleep. It does get better though - and I think one of the greatest benefits to me of sobritety is falling asleep and sleeping through the night. ( which I do now almost every night! ).
Take the advice of others too and see a physician if you haven't. They can do simple tests that will make sure all your systems are good and recommend any diet or lifestyle changes that will help. Prescriptions are available too that they might recommend, I personally asked my doctor not to prescribe them though as I didn't want to replace one addiction with another. You can choose whatever works best for you.
It will get better, that's guaranteed - great work and keep it up!