Hi Lilbobeep. Although I don't finish 'til next year, I understand your concerns, and often find myself worrying about how much I still have to do. Rather than making yourself stressed about the amount of work you have left, have you tried just thinking about one day/week at a time? Set yourself targets, e.g. 'by the end of today I'm going to have finished ...' and 'by the end of this week I'll have finished ...'. This will give you a sense of achievement every time you complete something. Maybe you could also write a list of everything you have to do, and score off each item as it's completed? You'd see yourself making progress and getting through the work.
Also, if you're writing, try not to worry about the details at first - just write roughly, so that you have a basic structure. This should also give you a sense of achievement as you'll be able to see something coming together on the page. You can worry about the fine details later. You'll be surprised about how much you can write in a short space of time!!
All the best, I'm sure you can do it!!