I am taking clonazepam 0.5 mg 2 times a day...After 5 hrs it wears off and strong symptoms come back. Is there anything else that I can take? Thanks

Yes. Talk to your doctor! if you've been taking the medicine for mor than 3-4 days, the doctor may adjust the dose.
Yes. You likely have several options. You should speak with your doctor about potential changes to your medication. The medication could be taken more frequently, the dose adjusted, or there are other medications you could use.