Is it really this bad for everyone? I am just starting to fund my startup now so I have yet to be in your position. But I've certainly faced a lot of challenges

Is it really this bad for everyone? I am just starting to fund my startup now so I have yet to be in your position. But I've certainly faced a lot of challenges in life and in my career, depression included, unemployment included, confusion after receiving an expensive degree from a liberal arts college in the middle of the worst part of the recession included. I survived all those things. I am incredibly optimistic and passionate about the startup I'm working on. But the part of me that worries feels like: if it doesn't work out it will be horrifying but it's a challenge I can handle because I've handled all those other things. My hunch is that if the OP feels the way he describes he needs to explore his relationship to failure and uncertainty and figure out how he can better handle those experiences.