I got 2,5/5 on my last test, which is practically a failure since at least 3 is needed to pass the course, but my teacher was so impressed with my class work that he passed me with 3. Suffice to say, I really liked that teacher.
That said, you might want to ask them for recheck. At least in here it's always possible to ask for re-examination of the paper(not taking the actual exam again) and if you are not satisfied, and have good arguments, ask for another teacher to check the results.
Hang in there.
Now then, today marks the second month of running for me. 40 minutes a day, three days a week and today I decided to kick speed by a big notch and increase the days. I've never felt better and haven't been in such a good shape since back in Muay Thai.