This is getting old

Let's review the facts:

I generally get up at 5am.
My mother knows I get up at 5am.
My mother knows I have a cold/sore throat.

At 9:40pm, the phone rings. I may not be asleep, but I should be.

Mom: How are you feeling?
A.: Okay.
Mom: Why is your voice like that?
A.: Because I have a sore throat.
Mom: What are you drinking? Do you have...
A.: I'm not going to have this conversation right now. [Cough, cough].
Mom: That sounds bad. When you cough, it's always serious. Okay, get some rest.