Gabapentin is a garbage psychiatric drug - it does what it does but when it’s prescribed for anxiety or as a mood-stabilizer it is being abused.

Buspar is a better anti-anxiety med. There are better - stronger and less-prescribed - anti-anxiety meds. I’m surprised that your doc won’t just increase your clonezapam? Or is that being prescribed by your cardio doc (the Propranolol)? Buspar is a real anti-anxiety med.