Possible teething? Already??

So my son was born Sept. 2. He was a week late and I had to be induced. He was almost 9 pounds. So the last couple days he has been really fussy and drooling a bit more than usual, causing funny poo. Now he is fussy when he goes to eat, aka latching then forcibly unlatching and crying. We have already thought maybe gas and was wrong. My sister came to visit who has had two kids and she felt his gums and noted how he was fussing and asked me to get a second opinion on him potentially teething. I can't get a good picture but when you lightly touch his gums on just the two spots it has obvious hard spots, and then tonight I just took a quick peek in his mouth after he ate and noticed two small bumps on his gums (around the canine upper area). Has anyone had experience with this?