There’s no reason that molybdenum or digestive bitters would cause a panic attack, and I’ve never heard or read of this happening before in connection with either supplement. But anxiety and panic attacks are both normal symptoms of a Candida infestation and of die-off; so severe die-off as well as the infestation itself will cause anxiety and panic attacks. My guess is that this was a matter of timing instead of the supplements themselves.
However, if you know much about panic attacks, then you know that if you believe that either bitters or molybdenum has caused you to have a panic attack, then each time you take either of these you will have an increased chance of experiencing another one. This is because, if you believe they’ll cause one, then the anxiety will start while you’re preparing to take the supplement and the anxiety could easily turn into panic.
Are you taking the herb Ashwagandha? You might try this for your anxiety and panic problem as it has helped a lot of people with this as well as resolving mood swings.