It's definitely best to avoid all meds if possible but I would venture to say that constantly switching medications and not sleeping properly are the worst things you can do to an injured brain. If the clonazepam helps with sleeping and you can't find any other way to sleep don't be afraid to use it. Benzos are not the best option but they can make the process a little more barable until you find something more suitable.

What dose of clonazepam and how often are you taking it?

I take lorazepam at night to help with sleep. I would not recommend it but not sleeping is worse than taking a low dose Benzo to get a full nights sleep, in my opinion.

It should be noted that I want to discontinue the lorazepam ASAP due to negative consequences associated with long term use. Unfortunately, I was on the medication before the injury and I doubt that going through the withdrawal now would be a prudent thing to do.

You really have to weigh the benefits to the possible risks as with any medicstion use.