I second the ginger tea. You can go to chinatown and in any of those markets you can find ginger tea. or you can try ranch market or a korean market. it's pretty inexpensive, like a box of 10 packets of ginger tea for like $3. the packet has a bunch of dried ginger pellets in it. just mix with hot water and you're good to go.
it really helps calm my stomach. i usually make a travel mug of it before i head out and drink the first cup on the boat on the way out of the harbor. i makes me burp and toot alot, so be forewarned, you'll probably need to hang out at the back of the boat after you drink a cup to inconspicuously set your gas free.
if the ginger is too funky for you, you can always add honey.