YOU SAID:

I am going to go get some coffee after class today.

INTO JAPANESE

今日は授業が終わってからコーヒーを飲みに行きます。

BACK INTO ENGLISH

I'm going to have coffee after class today.

INTO JAPANESE

今日は授業が終わってからコーヒーを飲みます。

BACK INTO ENGLISH

I'm going to have coffee after class today.