During my time in undergrad, my biggest obstacle was fear — fear that even if I tried hard, I still might not achieve what I wanted. For a while, this fear prevented me from giving serious thought to what I wanted to do after graduation.
You are not an imposter
Do you ever think that your success is just a result of luck, or you didn’t really earn your achievements? Do you feel like you tricked everyone into thinking that you are smarter than you really are, and it is just a matter of time before someone discovers your secret and exposes you as a fake? Do you believe that your accomplishments aren’t that special because you think “anyone could have done that”? If so, you may be dealing with imposter syndrome, like me.