This could be a type of situational depression actually, but I don't think that there is anything wrong with you per se.

As the work loads builds and you get further and further behind, the anxiety creeps in and depression follows.

I think depression in your case maybe a natural extension of anxiety because, well, you just get exhausted from worry. It certainly happens.

I write a lot for a living. I've noticed that some people have a very natural flow to their writing, whereas other (like me!) find it to be anxiety inducing.

It was important to me to realize that "perfect" truly is the enemy of good. I work on that every single day. Perfect is the enemy of good. Perfect can be paralyzing.

Now, knowing that the writing is going to give you trouble is a big step in helping yourself. Does your university have a writing center? If so these centers usually have people that can get you over the hurdle.

Another thing that has worked well for me is the mantra "don't think, just write." It's surprising how well that can work.

You might also want to invest in one of those speech recognition software programs. For some, staring at a blank page, or an empty computer screen is just awful. Talking comes much more naturally to them. You can always edit, once you no longer have to stare at that blank page.

It may surprise you to know, that most hospitals HAD to switch to an oral dictation service for their physicians. Why? When the doctors actually had to write the notes from a visit, they simply were not doing it. Piles of cases would mound up months and months deep. The problem was completely resolved when the physicians could talk the notes out.

Just a suggestion...

Overall, you'll definitely make it. Just some strategies for coping and managing the workload may be in order.