And I would add, try an equine sports massage therapist. They often give a free evaluation. An ESMT found something that the vet did not see or feel. A couple massages, and better saddle balance with wedges, problem solved - much happier horse.

I agree about the spurs or any type of tie down, tie up, or any other "thing" you could use to "make" a horse do anything. Absolutely the wrong way to think - the horse is just that, a horse, and only understands horse "language". Get a clinician to help you learn that.

 As someone said, start from the ground, start at the beginning. that is where you will get longlasting, desired results. I know from experience how to do it the wrong way,  and that is with spurs, a crop, or any other type of non-horse-language apparatus. I had to sell my previous horse and start over, the right way, and the results have been so much better (plus I've had a professional trainer help out when needed).

There is only one way to get what you really want - cooperation - and that only comes when you can interact in a way a horse truly understands. They don't use whips and spurs on each other!

I agree that spurs are not for forward movement.  They are meant to be used to refine your aids and for lateral movement.  The whip is for forward. 

How do you know she doesn't have any physical issues causing this behavior?  Has she been checked out by a vet?  She is also a mare, and that means her girlie parts could also be making her uncomfortable.  The reason I bring this up is because not all horses show they are in pain by being lame.  I personally know of one that can go around with abscesses in his feet and you can barely tell.  I also have a friend who took a nice horse off the track and he was so laid back that she couldn't get him do anything more than a jog on the lunge, but he looked sound.  Upon further investigation on her part, all of his joints were dry.  He needed injections all the way around.  Now he's happy as a trail horse. 

Please don't assume this is a lack of respect without ruling out any possible physical issues.  We ask them to carry us around and do our bidding, the least we can do for them is to make sure they are comfortable.  

 Perfectly sound. She had her shots last Wednesday and was checked by the vet. Her feet were also done on Monday. She was in heat the other day but if anything she has more energy when shes in heat (ha). I'll try the suggestions and start over if I have too. I am not experienced with training horses so I'm going on what my barn owner is telling me as well as the trainer at our barn. Thanks so much everyone!