If your stressed and freaking out she can feel that. Make sure all the basics are covered, diaper,hungry ect. All those fail you can try holding and bouncing her while walking around, sing, play some music, try and make her laugh. But first and for most make sure she doesn't have a fever, she doesn't look sick or pale or flushed. In the end if everything fails maybe call her mom. Mom's can sometimes hear a cry and tell you what kind of cry it is and how to help. Good luck!
A warm shallow bath almost always calms them down immediately. Don't ask me why, but it does. Just don't leave her alone for a minute.
i think she's hungry, try her pacifier, if she really goes at it then she's hungry and while you leave it in her mouth you can make her bottle or warm her food.