Thanks for the additional information.
If her front and back legs are having issues and she is displaying possible mini seizures, the most likely problem would be a disorder in her brain
or brain stem area. The episode a month ago definitely could be related. The most common disorders in her brain area that could cause all of these symptoms are:
-An infection around the brain tissue
-An inflammatory disease such as encephalitis
-A brain tumor
-A metabolic disorder such as liver, kidney, or blood sugar disorders
As you can see from the list, most of these disorders are not great news. At this time, my first recommendation would be to have some bloodwork checked and make sure that she does not have any metabolic disease that is causing this. Unfortunately, a brain tumor is the most common of everything on the list. If the blood work is normal then you may want to talk to your vet about possible considering a cortiasone medication to see if this will help to shrink down a possible brain tumor to relieve the symptoms that she is showing.
Hope this helps -please reply if you have any other questions.