My dd began drooling, got a diaper rash, was fussy, and started chomping on everything she could get into her mouth at 6 weeks
! A tooth on the top broke through - just the tip - at 10 weeks, then a couple weeks later, another one on the top and one on the bottom. All three went back under the gums, and she had bouts of teething off and on for months after that.
What really helped the fussiness was Boiron's homeopathic "Camilia" teething drops. They're little vials with one dose of the remedy. Sometimes one dose would do the trick, sometimes two or three. It helped when nursing was painful for her (the suction of nursing causes pressure inside the mouth which makes the pain worse).
She didn't cut anymore teeth until the day she turned 11 months, and then all four front teeth came in at once. So your boys could be teething, and the teeth may pop out soon like some of the other babes or they may take many more months. Apparently, the teeth moving around in the jaw cause discomfort for some babies. My dd was really bothered by that, but when the teeth actually came through the gums, there was no swelling, she wasn't up at night, not a lot of fussing - she was just a little whiny one day before. Whew!
Keep giving them stuff to chew on - sounds like you're clued into what they need. And try a remedy if it gets really bad for them. Don't think too much about the timing - some babies are BORN with teeth
. We're just conditioned to think that babies get teeth at 8 months cause that's the average - the normal range is gigantic!