For the last 24 houres i have had stomach pain what should i do?

it is about bearable at the moment but i don't want to over react and waste anyone's time as it could be just a real bad case of trapped wind which is not life threatening of course. however its to uncomfortable to go back to sleep.every time i lay on my front which is the only way i sleep and have done all my life the pain gets worse.what should i do? i find when im sitting up or standing up the pain is relieved quite considerably.