Thanks for asking the query,
Abdominal upset is the most common symptom after tooth extraction it is due to the antibiotics and analgesics prescribed to you, i would advice you to take an antacid
like tab rantac
along with the medications.
Follow the post extraction instructions given to you properly take lukewarm saline and antiseptic mouthwash rinses.
Take complete rest avoid anxiety
Hope you find this as helpful,