Yes, your medical will expire within the next 90 days according to this email, but how many days have they given to complete the new medical and upload it? Does the attachment say anything? also, I said it could be something else because they are not asking you to do the medicals again, only your wife and kid. Assuming you are the PA, how come your medicals are not expiring along with them?
Try contacting them over phone and try to get some intel. A webform can take days, even weeks to get answered