thanks for using healthc are magic.
Yes, excessive caffine intake is associated with increased frequency of panic attack
so you should avoid caffinated food like tea, coffee, cold drinks.
Clonazepam is mainly an anti anxiety drug but chances of addiction are increased.
You should consult the qualified psychiatrist
for detailed evaluation and treatment.
You may be benefitted by anti depressant
drugs having anti-anxiety proerties like peroxetine.
you should also do breathing exercise
and meditation for better control.
I hope you will be fine soon.