So, I did what we all discussed and suggested. I started small and slow IN the round pen. Just a Clinton Anderson halter and 12 lead. Small circles changing directions as calm and slow as she would do. Then I would drop the lead and rub and talk to her. Then took the lead off and just stood while she wondered.
Same thing the next day. Then we went to a lunge line. Panic at first, but I gave her as much freedom as possible as long as she was going forward...I tried for a walk only!!
That was okay...but still she wants to run off her feet...so I just tried little pressure and waiting patiently for her to slow and relax. When she did we stopped.
Now she is going in side reins and surcingle at a walk and a tiny bit of trotting...the side reins really are helping her stopping and rollbacks. I change them every few rounds around the round one, and just keep convincing her to go go easy. We are getting there. I did take her on a long gorgeous relaxing trail ride and she was FABULOUS!!! :)