Discouraged

Up until today I felt really good about mostly everything.

Then I got home and something changed. I felt discouraged. And I feel like I'm not growing again.
I think it may be because the publication I sent a piece to asked me to re-write it a bit. I know nothing's perfect the first time around but still. It was discouraging.
For the longest time I felt like I wasn't growing, as a person or professionally. I felt stagnant, like I was stuck. Just putting in my time for the next big thing but the problem was, I didn't have any indication as to when the next big thing would come, or if it would every actually occur. And what big thing was I looking for anyway? I can't even figure that out for myself. I felt like I wasn't doing anything to push myself forward and grow professionally. My career was on the line and I was doing nothing to help myself. So I found some internships. And now the first one is ending. Next week will be my last week and it sucks. I really like where I intern at right now and I'm scared to move to another publication. I'm afraid that I'll just fuck it up and not do well and never get a job or make enough money to support myself.

I'm a terrible writer and even worse journalist so why am I wasting my time?