Teething or Sick?

💜𝑺𝒉𝒆𝒍𝒍𝒚💜 • 💙 Boy mama 💙

How do you tell if your baby has a temp because they're teething vs being sick? My son, 7.5 months, had a temp of 100.9 on Friday, no temp yesterday, and now its 102.6! I already gave him tylenol and messaged his doctor, but I am not sure if he is sick or teething. I babysit m-f and I don't want to get the other baby sick nor do I want to make the other family miss work or scramble to find someone else so last minute.