Stomach pains could it be due to stress?

My stomach hurts every morning when I wake up I have gas and when I'm pooping my stomach hurts .I've been going through a lot of stress w 3 up coming finals next week and next week I'm going out of town w my boyfriend to el salvador I've never been there so my anxiety levels r up. I regret agreeing to go w him for 2weeks all cause I was afraid to say no. Now I have no choice but to go cause there's no refund. The stomach aches started a few days ago could it really be stress? I knw if I wasn't going to that trip I would be so worried