Took 3 mg. klonopin for 1 month at bedtime. Can I subsitute ativan to taper off?

Did not take Klonopin long but did get severe withdrawal symptoms when stopped cold turkey. I ran out of klonopin but have alot of ativan left. I did not abuse ativan and seldom took them. However, took way too many klonopin. I currently experience loud ringing in my ears cannot fall asleep. My anxiety level is high. Can someone let me know about substituting ativan to get off of klonopin?