Stomach issues/ suggestions

Thank you for reading! I have been a daily heavy smoker since Feb. 2020 and decided a few days ago to take a month long break. Day two was yesterday and around 12 in the afternoon I got extreme upper stomach cramping. I walk 10 miles a day for work, so this was really uncomfortable. This morning I woke up and felt ok but soon after I ate the stomach cramps started back up. Besides showers does anyone have any suggestions on relief? Aspirin seemed to help a bit but I’m thinking maybe I should taper instead of cold turkey. I’m only on day 3 but I’ve read it could last weeks, so I’m a little nervous about it.