whooping cough (pertussis) can be laboratory proven by an lab test. and so can strep. it is possible to develop both since they are two different organisms. i trust that you are under the care of a good medical provider who has properly tested you examined you and have you under appropriate treatment. these are not things you should self-diagnose or treat at home.
is it possible for strep throat to develop while you have whooping cough? . i had a very persistent dry cough for almost a month. i though i was starting to feel just slightly better when my throat swelled up and white patches appeared on my tonsils. it took about 3 hours to develop completely. it is extremely painful. the cough is also still apparent. i will go hours without coughing and all of a sudden have a coughing fit where it is hard to catch my breath.