Hello, this is Dr. David. I have read your question and I'm ready to help.
a salt foot bath would not be able to toll if you have parasites.
parasites can live in your GI system if you drink nonpurified lake or river water.
many things can cause diarrhea for one day.
your symptoms don't sound like paraasites.
the specks in the water could have been from just dry skin flaking off into the water.
we don't see foot parasites here in the USA.
you don't sound contagious for parasites at this point
most GI parasites are spread by fecal to oral spread.
by washing your hands after using the bathroom, you stop the spread of GI infections.
low energy levels can be from low iron, low hemoglobin, low vitamin D
, low thyroid
hormone levels, poor sleep, low B12 or other causes
you have to see a doctor for blood testing to check for these issues.
do you have a doctor who can do some testing for you?