Teething Questions

Andrea • Tommy arrived 12-5-16 ❤️
Hey ladies. So we are on vacation and of course my sons first two teeth decide to emerge. By the first night they had both cut and now you can see them. I was under the impression that once they cut the hard part was over? He handled it really well getting to that point, I didn't even know he was teething, but last night poor little guy moaned all night. Not crying but moaning. I'm assuming it's teething related. He would eventually put himself back to sleep without my help. But I'm not certain... I feel so bad for him! 
He also felt a little warm so I took his ten under his armpit and it read 98 degrees which I took as normal. Are you supposed to add a degree if taken under the armpit? 
And any thoughts on the moaning. It was a first for us, I would get up to make sure he was ok and I let him work it out on his own and he did, but it's out of the norm so I wanted some input. Could more teeth be coming in? Already? Is the painful part not over? 
Thanks ladies.