I really agree with your comment, but the problem with "What's the worst that can happen?" for a lot of us is that it's so easy to go down a rabbit hole and fin

I really agree with your comment, but the problem with "What's the worst that can happen?" for a lot of us is that it's so easy to go down a rabbit hole and find a way that your life would end or be ruined, no matter how unlikely it is. When I'm feeling anxious, like if I'm driving, I genuinely believe that I will be hit and killed at any moment, and there's nothing I can do about it. So the technique I use is I say to myself "It's pretty likely that I'll be 35 years old at some point, regardless of whether I try to get a post-bac or not. It'd be really nice to be a doctor by then". Substitute in whatever long-term goal you have like founding a company or running a marathon.