Too much of tests!!!

This week and last week there were so many tests I had to study for, all kinds of tests, spanish,health and math, infact there is an upcoming formative science test !!uhhhhhh!!! Some thing I noticed about me this year is, when I do all my tests I get a letter grade I'm not proud of, like yesterday. I recieed my results for my spanish test and I got 2 B's and an A. Last semester I mostly got all A's, except for one B!!! Somehow I'm getting results that I'm not too proud of!!! WHAT IS HAPPENING???