Dear L.,
I pullled this off the internet for you:
Diagnosis of Rubella
With the advent of vaccine protection for many diseases, including rubella, many of today's doctors have never seen cases of what were the common childhood diseases. If any of these diseases returns, there is a risk that the practitioner will not recognize it.
Since 1941, when a doctor first described the triad of deafness, cataracts and cardiac disease as the classical clinical manifestations of congenital rubella syndrome (CRS), strong efforts have been implemented around the world to achieve effective preventive strategies
This is nothing to take lightly and I certainly would have it diagnosed properly by an MD.
The rashes, if they form a scab and the scab comes off pre-maturely, can scar. For an older infant, hopefully, his immunity will be good enough to "weather the storm", but I would take every precaustion to clean "anti-virally" everything that he touches or puts in his mouth.
This is no laughing matter around the holidays. Hopefully all will be well in a few days if your call is correct.
After reading your second comment, I hope that you have called the pharmacist who cannot diagnose, but may be able to help with your situation and, also, give you additonal options for your immediate situation.
Stay in control, L.. There are people who care. You might also call your 1-800# for a nurse that may be associated with your health insurance plan. She may be able to escalate the level of your situation and assist you further.
God Bless You and your family,
E.