Should I have a remark?

Okay, so I just got my results! Yay! For the most part I'm happy, except for one striking exception in psychology.I've been doing super well in the subject ever since year ten. I've only ever dropped to an A once, and was really hoping on getting close to full marks on my final GCSE.And then I get a low B. Which is basically the worst I've ever done. I'm doing it for A-levels next year, and am even thinking about going for uni. But I'm slightly worried, because does this mean my teacher was just being a nice marker, and I'm not as good as I thought? Should I risk a remark? Ahh, I'm just damn disappointed.

(In other news, I passed physics. And I got my A*s in English. So that's good.)