Thank you for the query.
Possibly you are suffering from irritable bowel syndrome
Meva - C can cause mild dependency in some patients after prolonged use.
Hence can change to alternative drugs after consulting your gastroenterologist
with drugs which can be used long term.
IBS can occur due to multiple reasons one of them is stress
Also stress can aggravate these symptoms.
Another common cause is development of infection in intestine which gets cured on its own but leaves the intestine sensitive.
It might take time to become better some times years.
But need not worry, yes stress aggravates it so do not worry.
Possibly you might have acquired the infection after meat and then developed IBS.
Try following things and see if you feel better
Maintain healthy lifestyle.
Eat healthy, rich in fiber.
Avoid excess fat in diet, alcohol smoking
De stress yourself
Drink adequate water.
Regularize your eating and sleeping habits.
Can try taking a probiotic
in addition available over the counter along with curd and butter milk if you like it.
All this will make you feel better.
Hope this answers your query.
Wish you a speedy recovery.
Happy to help