Mikki, I will give you the answer from the law enforcement perspective. No, absolutely don't stop by yourself if you don't feel safe, you have no idea what you are about to get yourself into. That being said, I shook my head when I read your original post. You called a friend on that road, you called several "scanner friends" so I know you had a cell phone that was working. It seems you called everybody except the folks who could actually investigate and intervene if a problem actually existed.
Why would you not call the police FIRST!
One of two things are happening at that situation. First, the woman is in real trouble. Two, someone is acting stupid and their actions constitute a crime. Jumping in front of a moving car on a dark road claiming to be in trouble to scare or alarm the operator certainly constitutes at least a disorderly conduct arrest.
There is no need for you to be afraid to call the police, you are not bothering us. We want you to call in with suspicious activity. If we investigate and find nothing, theres no harm done. You also may be a witness to a crime not yet reported, discovered or released to the public. Not all crimes reported are dispatched over police radio's, especially those involving sex crimes. Even though some time has passed since this happened, I would still report the event to the county sheriff's office where it occured.
Mikki, I would be happy to answer any questions you have but, I will not engage in debate. This is a very anti-police site and I will not be drug into that nonsense.