26M. started Prozac 2 weeks ago. OCD  and health anxiety. Over the past year have had 100+ doctor appointments and tests in several countries. Nothing significant found. 

Panic attack resurfaced yesterday. No cardiac cause yet high blood pressure and crunching/gurgling in chest. 

HOW can I learn to accept that the cause of this is anxiety? And not some missing undiagnosed rare issue, side effect, underlying problem, nutrient deficiency, electrolyte imbalance, food sensitivity, or supplementation fix? 

How does someone make that real shift?