Having a bad day and started thinking of what happens if my career fails. What happens to the people that don't get enough publications to eventually become group leaders and professors? Can't imagine doing anything else than biology, but what if I find out after 10 years that I'm not as good as I thought?

all these are what ifs mate. most what ifs never happen. they only suck our energy..so stop worrying and start making things happen in ur career. trust me. it works. those who succeed are those who what if less and get on with it.