Hi Dr., I Am Very Afraid That I May Have

Hi Dr., I am very afraid that I may have gangrene developing in my right big toe. In the same week I got a bruise under toenail from kicking a dog toy, and developed and ingrown toenail on that toe. It's been 2 mths and bruise has still not gone away, also toe feels cold and a little numb. It is not very painful though, and no major discoloration of toe besides bruised nail.