After a crash, you should contact the Reading Police Bureau as soon as possible. Not only can they assist with the immediate aftermath of the accident, such as directing traffic and ensuring everyone's safety, but they will also document the scene and create an accident report.
You should also seek medical attention, even if you feel fine. Some injuries such as whiplash may have delayed symptoms. There are several local hospitals in the Reading area, where you can receive medical treatment, including Penn State Health St. Joseph Medical Center and Reading Hospital - Tower Health.