You may eventually get better on your own, but having a physical therapist would speed the healing process. Swelling/edema is not necessarily bad. Swelling is a natural process that allows the tissue to repair itself. As you push yourself to be stronger and more limber, you will have bouts of swelling that correspond to that activity. This is why having a physical therapist is a good idea because he or she can monitor your improvement and adjust your therapy.
I have always had a fear of physical therapy because of the horror stories of them doing more damage than good.
My granddaughter graduates this year in Knoxville as a physical therapy assistant. She said that they teach now that you don’t have to cause more pain to fix the problem through PT.