4 year old just swollowed a 10 cent coin. she says it isnt stuck in her throat but should we take her to the er? dont know what to do?

It happens: If she can drink fluids it made it to her stomach & may pass quietly in 3-4 days. If she develops colicky abdominal pain over time I would consider a doc visit. An x-ray could confirm its presence & location but I don't consider the issue an emergency. I kept a metal detector in my office to verify these without an x-ray.

Swallowed a coin : Most of the time, over 80-90 percent of these pass without issues. I would say if he hass pain, then take her to the ED. If not call the pediatrician.