<human>: Can you condense the text into three sentences or less?

This may not belong here, but still I want to let this out. Let me explain the situation first. Regular 2-sided test. I am not very bright in spanish, but I wrote what I could. Fast forward one week, we get the results. The grade quite surprised me - I was expecting something between C and D but it was a B. 

I quickly went through the test. I noticed I have a bit too many mistakes for a B, so I counted all the points - I had 9.75 points on the first side, and 11 on the other, which sums up to 20.75 out of 40 points total. Then I look back to the results - and I see 31.75 points total. The thing that probably happened was that the teacher somehow added the second page to the total points twice, resulting in 11 extra points and a B instead of a D.

Now a huge emotional roller-coaster started for me. I either could have staid quiet and abuse my teacher's mistake and keep my B. Noone would probably ever know, as we even got to keep the tests. And with my grades, I could definitely use a good grade for a change. Or I could have told the teacher about the mistake, which seemed to be the right option. And at that point, I had no freaking idea what to do. I knew I *should* tell her about the mistake, but I knew I really didn't want to. I even asked some of my classmates for a help. I know they are not those kinds of bastard that would tell the teacher right away that I even considered to abuse the teachers mistake. But, they weren't able to give me an advice on what to do at that point. This took probably several minutes.

Then I finally was decided. I spoke up, and told her. It was such a strong moment for me. I was so proud of myself, but also felt pretty shitty that I just let that easy good grade slip away. It was really a bittersweet feeling.

The thing is, I don't think I can really talk to anyone about this - because I would probably end up looking like I did that just so that I could brag about it everywhere.

Thanks for reading and sorry for my english.
<bot>: My teacher gave me a B by mistake on a test where I should have gotten a D, and I told her. I can't tell anyone, because I would look like a bragging bastard.