I took 2 Excedrin 5 hrs ago and now I’m having mild abdominal pain. I did not take any other medication in the last 24 hours and I did not have any alcohol. I have taken Excedrin before and am usually fine. Also a bit gassy.

Give it time. The stomach upset and taking the Excedrin may be coincidental.
Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex.
Get HPV vaccine.