Klonopin is a heavy hitter drug and I believe addictive.
I would just have a conversation with your doc about anitidepessants that contain ingredients for anxiety.
You are pretty young and doctors may be concerned about antidepressant and your age. These drugs can cause suicidal thoughts in the younger population.

Like I said, maybe a frank conversation about the "tense" feeling and see if its anxiety or spasticity. Then go from there. You need to know what you are treating due to the amount of years you will be treated. I like to keep the drugs to a minimum due to side affects and the fact that I have a lot of years left to bombard my body with drugs!

Find out from your doc if you suffer from spasticity or anxiety or both. Klonopin is great for anxiety but addictive and in time you may need higher doses to do the job.
Personally I like my antidepressant with the anti anxiety properties built in. But it may not be right for everyone.