Should i run today ? :c?

yesterday i did 2 miles , its just practice cuz the coach doesnt train till july 15 but they are marking absences and yesterday at night i ate 3-4 day old tuna and this morning i woke up with huge stomach pains and had to go to the bathroom alot and i ate toast and advil so i think i feel okay , not great but i feel okay but im scared what if i get a huge stomach pain while running or i need to use the bathroom? should i go today??? we are running 3 miles today