Hi.
Thanks for your query.
Noted the history of loose stools that smell,
stomach cramps, in spite of not changing diet, eating healthy, there is history of 2nd degree burn last week with wall paper stripper, healing well, was also late for periods.
As per the history you have provided, this looks to be intestinal infection and could have occurred due to reduced resistance of the body due to burns or so.
I would advise you the following in such a situation:
Send the sample of stool and blood to see for the infection. Get a course of an antibiotic,
metronidazole,
probiotic and so on.
Maintain hydration and electrolyte well.
Continue full home made diet.
Multivitamins helps both the burns and intestines.
Take care of the healing burns well.