I tried to check his gums but he wouldn’t let me. He’s fast asleep now so maybe he was just over tired but he usually takes a feed when he’s like that so I wasn’t 100% if it was him teething with him refusing a feed
While there are general signs (drooling, mild fever, crankiness) it's honestly hard to be sure a baby is teething before the gums are visibly affected. My son faked me out several times before having two teeth pop through with no fuss to speak of.
I was an infant daycare teacher for four years before I left my job to be a mom. I’ve seen a thing or two with tons of different kids. The running joke in daycares is that any sickness is really just teething, and a lot of articles will tell you that teething only has a few symptoms, but after being through so many different teething sequences, I can tell you what I know. I always know a child is teething if I see these things: Lots of drool, lots of eating fingers and toes, diarrhea, runny nose, pulling at the ears, sometimes a fever, more irritable, not sleeping well, spitting up more. My son is almost 10 months old and has 4 teeth as of the last month. He experienced the drooling, pulling at the ears, not sleeping well, spitting up, and eating his fingers and toes.