you losing muscle,, inother words shrinking,,in other words losing some fat and some muscle,,adjust diet to daily activity,,you are a student that is active 24/7 you need more calories,, majority of them clean with couple cheating meals per weak if cutting,,
if you were home all day long and only trained an hour at night 4 times per week,,then your current calories would be ok,,anyother case you will shrink to a very small weight and still wont touch 6% bf,,
trust me on that,,i do it for living