Sorry to hear your story, though a good reminder for all to keep an eye on their feet, and hope all goes well in the future.
I have suffered from ingrowing nails since I was a nipper. They always drew blood when trying to cut them, in the end the podiatrist arranged to have them trimmed in hospital.
This Involved cutting the sides of the nails and killing the roots in the area that was causing trouble, I choose instead to have the nails permanently removed even watched them doing it. Its the best thing I did for my toes, no more pain and blood, with a bonus its two less nails to cut.