I ran a cart weighing over 200 pounds over my little toe next to the pinky toe. Now it's very stiff and painful. Also lingering pain?

Follow up. Follow up with your primary care provider to have an x-ray to see if there is a fracture. If the toe has a displaced fracture it may need to be realigned, otherwise, you will definitively know and be able to nurse that toe back into healing. Follow up closely with your primary care physician.
Get an X-ray. it may be fractured.