Hello. I had an umbilical hernia repair 13 days ago. Everything was going OK until 2 days ago. Now whenever I stand or bend I have EXCRUCIATING pain where the hernia was. I haven't done anything to tear my sutures, and I haven't felt anything pop or tear

Could be normal but. It depend how is the hernia is repaired open or laparoscopic,with or without a screen or mesh.the pain could be normal but unusual to have so much pain without any incident or trauma , my advise is to see your surgeon and share this information . If I was your surgeon I would like to know how you are doing and any changes in the status of your pain .