Hi.
Thanks for your query.
Noted the history and understood the concerns.
The
backache might have started due to the inflammation caused by
colitis and thus this is a reflex pain.
Loose motions indicate that you have intestinal infection and the
septicemia causing the headache too.
I would advise you the following:
This can turn to be serious if not attended well.
Get a clinical evaluation and examination done by a Doctor and get a prescription based antibiotic,
metronidazole and probiotics so that the problem may get cured.
Also get the stool tests and the tests of blood to see for infection and liver and kidney functions.
Take homemade food, boiled and cooled water, plenty of it to avoid
dehydration.
Electrolyte solution so that the weakness is not felt.