Obsessive worry about health, if persistent for weeks or months, maybe identified as health anxiety disorder (previously known as hypochondria). I feel that you will have to deal with your anxiety first, if required through a psychiatrist and maybe with some kind of medication, probably for some time. Once you start feeling better with that, you may have to consult a psychologist to work out strategies to ensure that the anxiety, especially the health anxiety, does not return in you.
Next Steps
Please consult a psychiatrist followed by a psychologist.