22 month old possibly teething? Should I give Tylenol? Thoughts?

My son just turn 22 months and for a while now he’s been different. He’s usually a happy baby, but he’s been very cranky. I’m not sure if it’s terrible twos or if hes possibly teething. He’s hardly eating as well.

Today has been the WORST. He hardly ate anything at all - even his favourites. He didn’t even want to brush his teeth which is he favourite thing to do. He looks tired. He keeps crying and is very upset. I gave him my smoothie and he took the straw and was biting it. So I gave him a cold teether toy and he was rubbing it back and forth on his gums.

For short periods of time today he’s been happy and laughing...so idk. What do you think?

In the past whenever he was teething he wasn’t this bad which is why I’m confused. I’ve been checking always everyday to make sure he doesn’t have a fever and he’s fine. In the middle of the night last night he was crying off and on.

Should I give him Tylenol before he goes down for a nap? I hate not knowing what’s wrong!!! And now I’m all paranoid because of everything going on.