I think ultimately only you can answer that question. If being at home would increase your stress levels as you are worried about network issues, then going to a test center might give you peace of mind. the end of December isn't that far away. If you are worried about not passing it and having to take it again before the exam changes in January, then going for a date as soon as possible would perhaps be better, even if that meant doing the test from home? There are pros and cons of both situations!