Yep, the whooping cough doesn't necessarily have a whooping sound or is as evil as a lot of us think... my gp did tell me that the classic symptom for whooping cough is cough/gag/vomit... so getting a test done just in case is a great idea.
In any case I don't believe it is any harm to your unborn baby... just makes you very run down and miserable!
Hope you get well soon.
x