Teething?

I lost my first tooth when I was four years old. I lost my last tooth only a few years later. I got my 12-year molars when I was nine. I got my wisdom teeth when I was 13 or 14.

My point is, I was ahead of schedule with my teeth. And now it appears that Callum may be following in my footsteps. I'm still not totally convinced... especially because as far as I can tell from the articles I've read on teething, pretty much every parent seems to become convinced that their child is teething the day they hit four months old... but it really does seem that way. Even though apparently teething doesn't usually start before six months.

Here's what we're dealing with at the moment:

• Many consecutive days of exceptional amounts of fussiness. Our mellow, easygoing, laid-back baby has started shrieking unhappily for no apparent reason. He's not hungry. He's not tired. His diaper is dry. He's not sick. He's just not happy. All day long.
• Bottle refusal. Callum has always been good at self-regulating his food intake, so we've never pressed the issue if he's refused the bottle in the past. But now he gives clear hunger signs but still fusses and turns his head away from the bottle. If we try a few times, he'll usually take it eventually--and then eat a full meal. His overall daily food intake hasn't changed--it just takes a lot more work on our parts to get him to eat.
  
• Chewing. Hands, toys, our fingers, his clothing, his car seat straps, whatever. If it's near enough for him to grab, it goes straight into his mouth. This is normal four-month-old behavior, so it might or might not be an indicator of teething.
• Drooling. Same as above--this usually starts in earnest around four months anyway. It only seems to be excessive when he sleeps, during which time it collects on his shirt.
• Lip sucking. Just in the past couple days, he's started pulling his lips inward and pressing them against his gums. I can only assume that this relieves pressure? I've never seen him do that before.
• Ear-pulling. This happens only occasionally. I did some reading on whether this was a sign of an ear infection, and pretty much everything says that if they seem otherwise happy when they're doing it, and they aren't congested or feverish, it's more likely a teething sign. That description applies to him--I've only noticed him doing it when he was totally fine otherwise, and not fussy, plus he has no symptoms of sickness--so it seems like it's probably teething-related.
• Trouble sleeping. He's still sleeping fine, but not as well as he was. For awhile he was sleeping through the night until 8 a.m. or later on a consistent basis. He still does that occasionally, but more often he'll wake up sometime between 4 and 6 a.m. Luckily when he does this he pretty much just eats and goes back to sleep, so I recognize that we're still pretty well off in this department. But it definitely signals a change from his earlier sleeping habits. He also has more trouble falling asleep at night--when we put him to bed, instead of just peacefully going off to sleep on his own as he did for the first four months of his life, he fusses for awhile and sometimes needs extra soothing before he falls asleep.

So. It sounds like teething to me. Does it sound that way to you? Because the thing is that what we aren't dealing with is actual teeth. His gums look and feel totally normal to me. And I'm a little bit terrified that if this is the start of teething, it's going to be a long time before any teeth actually show up. And I would really rather not deal with this for months on end. Plus, I would really rather my baby not have to go through this for months on end. It doesn't look like much fun! I miss my non-fussy baby. And I bet he misses not having a reason to be fussy, too.