When I stopped taking my morning klonopin I had trouble sleeping for a few nights as well; I think it can take a while for the body to get used to its new normal.

What helped was that I was still taking 1mg of klonopin at night. After about 4-5 nights, I was sleeping normally again. Are you/can you take more at night than in the morning? Or can you replace a night dose (if you're taking that) with an additional medication to help you sleep?

Best of luck. Lack of sleep can affect everything, I hope you're able to sleep soon.