I need help! My 1 year old has been screaming like bloody murder for the last hour. She is eating…

I need help! My 1 year old has been screaming like bloody murder for the last hour. She is eating running around, but she is just screaming. Like the kind that makes you start taking quick gasping breaths. I keep thinking she is in pain but then she'll stop and blabber for a minute. One little thing sets her off. I don't know what to do. She woke up at 10 this morning, didn't take a nap so my husband and mother in law think she is just super over tired but that doesn't make since! Please help?!

*pic for attention*