Constant motion sickness after flying.

I recently took a two week trip with my school to Nicaragua. while there we took many boats and flights to get around the country. my vertigo symptoms showed up a few days after i took a large fairy to an island, they eventually went away after a few hours. but, between the returning flights i began to feel motion sick. when i returned home i went straight to bed, the next morning i had a sense of swaying (like the tides of the ocean). it's been almost four days now and there is no sign of this stopping. my ears and sinuses also slightly ache and the vertigo goes away if im active (running, biking etc.) but returns if i sit or lay down. it's getting to the point where it's starting to worry me. i believe this has something to do with my ears. ps. i've been taking malaria medication