Temperature, when to worry? (FTM)

Courtney • Baby Caroline was born 7/29/18😻 #Policewife #FTM

My daughter will be six months old January 29th, she’s been a little fussy lately and I figure she’s just teething. Tonight she felt a little warm so i took her rectal temperature and it was 100.2. I gave her some Tylenol and then nursed her to sleep. My mother in law who had three kids said to just give Tylenol and she should be fine, that it’s just a low grade fever. Is there anything else I should be doing? At what point do you call the pediatrician? Thanks in advance!