chill out?

i dont understand how some people can live so lightly. like the thoughts in my head are so heavy that i dont see how to get through them. without therapy or meds, i cant see getting through these trying times. when i lay down at night i think deeper and deeper. i cannot fathom ignoring my thoughts. it just doesnt seem possible. yet people day after day live with no worries and i would love to do the same. i want to chill out. but how. how when the thoughts dont stop. from what i hear people speak about in the grocery store to the music i listen to. there are so many things to learn and so many things to take heed to. so i continue to think and analyze. maybe i over analyze. but how can i stop?