I am taking clonazepam 0.25mg the most of 2x per week to prevent panic attacks. like when i go to stores or drive long to make me relaxed. bad idea?

As needed: At that low dose and at that low frequency, you are probably quite safe and probably would not suffer withdrawal if you did stop. So, if it is working well - don't worry. In fact, if you are otherwise okay, that's good. But if you have other concerns you might consider a CBT therapist to learn skills for avoiding, reducing and managing stress, anxiety, etc. Best!