What Is Causing My Lower Back Pain, Nausea And Blurred Vision After A Miscarriage?

Hi have been having lower back pains twos mths after a missed misscarriages with migrains headaches with nauser and blurred visions and pain in one side of my stomach. Have had surgerys on my fallopian where the pain is and a feeling of uncomfulness when I sit down on my lower back and also have shaking