Will my GSD injure heal her self or i should go to vet?

I think if she is still limping tomorrow she needs to see the vet. You can go over the leg carefully (palpating it) to see if you can locate the problem area. Is it the knee, the shoulder or the foot/pad? Dogs do sometimes stump or jam their toe, so I'd gently pull /manipulate the toes individually to see if that is the issue, esp if you determine it is lower than the knee.