Sick, anyone else go through this?

My daughter got sick on the 21st and later in the day my son started feeling sick The 22nd is when me and my husband caught it. We all just assumed it was a cold and we're just waiting it out. I was also on my period 20-25th Once my period ended my nose stopped running, everyone else started feeling better, the kids cough once in a while but are better same with my husband he's all better But now it's the 29th and I still have a bad cough and I have a coughing fit every like 2 minutes (I wish I was exaggerating but I'm not), water doesn't help, nothing helps, my throat hurts constantly with no breaks it's not a bad pain and doesn't stop me from doing daily tasks but it is annoying We've had a plumbing and flood problem and my husband said it could be black mold somewhere but doesn't know why I'm the only one dying while everyone else is fine