Dear Nikki, When I was younger, grades were no big deal. When I started middle school this year, though, that all changed. Now I’m obsessed with my grades. In the past, if I didn’t get an A or above, I would get kinda frustrated. Now, if I get anything below a 99%, I burst into tears! I put too much pressure on myself, but I can’t stop! How do I stop freaking out over my grades?! A+ Anguish Hello A+ Anguish, Oh my gosh! Okay—take a deep breath. Seriously, breathe in slowly through the nose…