YOU SAID:

i'm going to go swimming heaps today

INTO JAPANESE

今日は水泳のヒープに行きます

BACK INTO ENGLISH

I'm going to go swimming heap today.

INTO JAPANESE

今日は泳ぎに行くつもりです。

BACK INTO ENGLISH

I'm going swimming today.

INTO JAPANESE

私は今日泳ぎに行くつもりです。

BACK INTO ENGLISH

I'm going swimming today.