Yes it does. This will affect negatively to your average score. At least I hope you have full credits for all the courses at school and there is no subject under 50. And this may make you second-term academic performance at school not so...good looking. But apart from those, there is nothing to worry!
Now its your job to negotiate with your teachers to redo exams or assignments and try doing better in the following months.
I hope you do the best !
