I have read carefully all your concerns and I am sorry for experiencing such sad situation.
with regards to your diarrheaI recommend you to use
-plenty of fluids
-tasectan with a glass of water
If it still persists please you should do coproculture , fece analysis like candida, ova and parasites, abdominal ultrasound
and blood work.
with regards to your pack pain, I belive it may be real,
so you can do:
-you can use some times opiod analgesics like tramadol
as it possibile
with regards to your liver
use , it is toxic for the liver .
you take 3 grams a day for 20 days per month, it a high and toxic dose for liver, so you should do balance biochemistry.
So I recommend you to stop use of acetaminophen ore decrease the dosage
all the best
p.s. if you have further concern, do not hesitate to contact me