I well up with tears in one cl olny no other cl why ?? help please ?

this cl i always well up in tears in is sociology, It started when i did all my cousework and he told me i had to do some of it again and i cried and since that day i have teared up in his cl. i dunno why and not the cl work ones just the coursework lessons which i have period one on monday morning every week with a male teacher do you guys know why this could be is it maybe pressure of work please heklp im freaking out