I keep having stomach aches :(

i am a 15 years old girl. It is normal for me to have stomach aches when it's my time of the month. But it has been a few weeks already and I keep having stomach aches, like everyd single day... maybe more than 3 times per day. It is usually after I eat something then after a while my stomach starts to hurt. I don't feel like I'm going to vomit or dizzy. my stomach just hurts a lot. what should I do? Do you know what is causing the pain in my stomach? :( I don't want to go see the doctor. :/ but if I have to then... I guess I have to.