That niggling feeling that you’re not where you’re meant to be? It could be time to stop ignoring that.
We spend a lot of our lives at work, which means it's essential we are happy there most of the time. Of course your job isn't always going to be fun and games, but you shouldn't be waking up every morning with an impending feeling of doom.
Even if you don't actively hate your job, maybe there's a niggling feeling that you need a change, to push yourself. In either one of these scenarios, you should consider a new career - and that can be scary.