Do you have pets in the house? Ringworm is a very nasty skin fungus and very very hard to get rid of, if you have pets I would be 99% sure that is the source. You must eliminate ringworm on EVERYONE including Fiddo and Fluffy and please do so well before your baby arrives.
We had a issue with ringworm due to a persian cat we got from a bad breeder. Tea Tree oil did not work, the cat was forced to take Rx medication, and the entire household had to bathe in anti-fungal shampoos.
Our cat was not able to rid himself of the ringworm due to a very very poor immune system. Due to the reccomendation of 2 vets, he had to be put down, after 6 months of costly treatment he was left with massive sized body sores and bloody scabs. My husband, daughter and myself were able to rid ourselves of this, but not our poor little Persian.
My husband and I are big fans of herbal remedies, but ringworm is not something that can be treated with herbal cures. Typically in humans, you can build up an immunity after 8 weeks to 4 months, but your animal may not be able to build up an immunity to the fungus, as was our case.
Please speak with a vet and seek proper medical advice. Ringworm on an newborn infant isn't something you will want to contend with and the spores can linger in your house for months on pet hair and bits of skin.