YOU SAID:

Gonna be slightly more active today as I am very sick and am not at school

INTO JAPANESE

私はとても病気で学校に通っていないので、今日はもう少し活動的になります

BACK INTO ENGLISH

I'm so sick that I'm out of school so I'll be a little more active today

INTO JAPANESE

私は病気で学校を休んでいるので、今日はもう少し活動的になります

BACK INTO ENGLISH

I'm absent from school because of illness, so I'll be a little more active today

INTO JAPANESE

病気で学校を休んでいるので、今日はもう少し活動的になります

BACK INTO ENGLISH

I'm absent from school because of illness, so I'll be a little more active today