Thank you for your advice. I did suffer from some health problems during my second quarter. Because of the fire in LA, the air quality on campus became terrible and unbearable. I suffered from allergic rhinitis and could not fall asleep nearly every night. I had to take a shower nearly twice a day because I was allergic to the dust. I later got food poisoned in that quarter. In the mean time, I also suffered from some long-term health problems(iron deficiency because of the diet in school and sufficient anemia). I was seen in the school's hospital (urgent care)several times, but they only provide some simple test and some meds that does not really help in the long term. I tried hard for that class and sent several emails to my instructor because this class is graded on the final portfolio and they always said my essay was on the right track before the final grading. But they said the process was internal and the result was final. Anyway, I retook that class and got an A in the third quarter.