[Grammar] Past Perfect Simple VS Continuous: had had/had been having

[naweewra]

Hello,

In this situation, which tense would you use?

a) The doctor asked me how long I had had this chest pain.

b) The doctor asked me how long I had been having this chest pain.

Thank you.

Nawee

 

[MikeNewYork]

I would choose B.

 

[Tdol]

But there's nothing wrong with a).