3 Week Kitten Squawks All Time When Picked Up?

I have 2 little kitten girls. One is 3 weeks old and the other is 1 month old. When she was younger, I caught her in the act of vacuuming up her brother’s food bowl when he wasn’t looking! She has been an angel since but lately she seems to be teething pretty bad (she is biting my fingers). However, every time I pick them up they both start making this loud squawking noise that sounds like it’s coming from their throats. It kind of sounds like kittens crying except not really because it doesn’t sound distressed or anything…more like they are “making point.” Could something be wrong with them?