My children had contracted whooping cough last year and it lasted for ten weeks. The whooping sound didn't come about until around week three when the coughing became worse. My daughter was in preschool and from what I have learned after the fact, unvaccinated children whom attend public schools have been known to contract whooping cough by coming in contact with vaccinated children who have parapertussis as a result of their vaccination. The diagnosis of parapertussis in vaccinated children is often overlooked because it is assumed that if a child has been vaccinated, then they do not have it. This assumption is wrong!!
 If it is pertussis, there are many things that I did for my children that helped us get through it. My children's doctor had no advice to offer about how to deal with pertussis so I had tried almost everything I could find until I found things that work. If you would like more info I will gladly share, as I created a whole folder to document what made it better or worse.
  I hope your DS is feeling better soon and that it isn't pertusis. If it is, don't panic! My children made it through and are very healthy one year later. One last thing, antibiotics will NOT speed up recovery as this is an illness that must run its course. Taking an antibiotic will kill all of the good bacteria that could aid in helping your little man get better, which will delay the recovery.Â