Seeing the doctor with the simple flu is not the best way to go, I agree. But lemme tell you something, when you have asthma as well as heart problems, you dont wait till the grim reaper appears to get care.
That doctor saw the problem and it was time to act.
And I dont take advice from people that think they know better. I take my advice from myself as well as the professionals.
BTW, I am a logger/timber producer.
Flu can turn into pneumonia, and sometimes opportunistic bacterial. Because the lungs get so trashed that bacteria take advantage. So if you feel better from the Rx, probably you had bacterial infection as well as the flu.