I need to teach for the coming three days

[Silverobama]

In my TikTok chatroom, I haven't spoken English for a while. Members notice that I was in the chatroom so there were curious:

A: Silver, come and join us.
Silver: I need to teach for the coming three days. I'll use my voice all the time. I don't want to talk now.

I wonder if the italic sentence is natural and grammatical.

 

[emsr2d2]

In my TikTok chatroom, I haven't spoken English for a while. Some members noticed that I was in the chatroom so there they were curious and said:

A: Silver, come and join us.
Silver: I need to teach for the coming next three days. I'll be using my voice all the time. I don't want to talk now.

I wonder if the italic sentence is natural and grammatical.