Looking on the internet deeply has found these results:

I am not well is the most popular phrase on the web.

I am not feeling well 1632,000 results on the web	I am not well 11,170,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
How can I act like I am not feeling well when I am feeling well. I am afraid he's not feeling well. That's why I'm covering his class today. I want to continue speaking, it is just that I am not feeling well. Do you even care that I am not feeling well? Call the army, I am not feeling very well. I am not feeling well today. 'Cause I am not feeling well. «I would like some advice from you, because I am not feeling very well. I am in distress and I have even thought about suicide.	I am not well, I'm calm. I pray you, give me leave to go from hence. I... I am not well. I am not well in health, and that is all. I am old and I am not well! I am not well. I don't know. Please. I... I am not well. Please, I am not well.

I am not feeling well

1632,000 results on the web

I am not well

11,170,000 results on the web

More popular!

How can I act like I am not feeling well when I am feeling well.
I am afraid he's not feeling well. That's why I'm covering his class today.
I want to continue speaking, it is just that I am not feeling well.
Do you even care that I am not feeling well?
Call the army, I am not feeling very well.
I am not feeling well today.
'Cause I am not feeling well.
«I would like some advice from you, because I am not feeling very well. I am in distress and I have even thought about suicide.