Get a cold, call in sick. That is how it should be and how every responsible crew member handles it. The danger is not only with the normal pressurization changes and the possible baro trauma from that, as a crew member you always have to keep in mind that a pressurization malfunction might lead to a rapid depressurization which can incapacitate someone with a cold immediately and will in all likelihood lead to a loss of the medical, which in turn means loss of the job.
In that light, calling in sick is an act of self preservation.