Are you sure it’s not reflux / silent reflux? That can cause the excess saliva and the cat napping
I hope this helps. Also ask your pediatrician if your baby can have some Tylenol and IBU. Tylenol for the discomfort and slight temperature and IBU for inflammation.
I bought my daughter this. https://mossandfawn.com/ She’s not teething yet but what I read on their product is great. Not only can it be a teeth ring. It can also help with some motor skills. It is also used for introducing food safely. I bought the ring and the ice tray. The ring comes with a couple of sizes. Like the nipples for bottles. I cannot wait for her to try it!
@Shannon thanks for this, will have a look and ask.