Please help to correct.

[blissful]

Hi

I know we can say.

I haven’t got angry.
I have been upset.

But may I say.

I hadn’t got angry.
I had been upset.

Thank you.

[SirGod]

* Not a teacher

Of course you can, both examples are possible in the right context.

[billmcd]

Hi

I know we can say.

I haven’t got angry. In the U.S. you would more likely hear, ".....gotten angry" but in your example probably also followed by "since.....", "about......"etc.
I have been upset. OK.

But may I say.

I hadn’t got angry. Same comment as above.
I had been upset. OK.

Thank you.

b.

[blissful]

Hi

Is it natural to say “I had been upset when my mother visited me”?

Thank you

[bhaisahab]

Hi

Is it natural to say “I had been upset when my mother visited me”?

Thank you

No. You could say "I was upset when my mother visited" or "I had been upset before my mother visited".

[blissful]

Hi

Could we say

He believed I had been upset before my mother visited me.

Thank you

[SirGod]

Hi

Could we say

He believed I had been upset before my mother visited me.

Thank you

* Not a teacher

Yes.