Leg amputation?

My beautiful Jessie was hit by a car 2 nights ago and she's been hospitalized with a 'degloving injury' of her front left leg. Fortunately, she does not have any internal injuries, no head nor spine injuries. The vet has told us that the leg prognosis is not very good. She will need at least 2 months to recover from the tissue damage and after that she would need her ankle/paw bones fused. Even after all that it is no guarantee that the leg would function. Another option the vet mentioned is amputating the leg. It would minimize the painful recovery with scenario #1 and the risk of infection (since there is no skin left in the area).
Before any of you judge me that I should have been more careful, I am completely devastated. I can't stop crying, I am seriosly depressed. I got her from a shelter several months ago hoping to give her another chance, and this is the way it ended..

I would appriciate any advice about JRTs with one leg amputated, has anyone had an experience like this?