Dont freak, she's just in labor. It is important not to bother her, there is nothing you can do but wait a couple hours until the fry arrive.
Good luck,
Mollie( yes thats actually my name)
Check your water chemistry. Mollies can be more sensitive than other common livebearers to low pH or low mineral content in their water. A symptom called "shimmies" results from poor water chemistry and can be readily cured by a huge water change.