How old was s/he?

I feel like dd has been having meltdowns over minor things since about ten months, and it has escalated to screeching.

She's also teething now but even when that's not a big issue, it happens over small stuff: not wanting to go in stroller/car seat/high chair, not being able to get something, etc. It's worse when she is sleepy (and she isn't a great napper) but it happens even when I know she's not tired too. I know this is normal for toddlers but she's still so young... I feel like babies her age (and younger) aren't usually quite this grumpy all the time.