Ok I was eating some raisins but i: was laying down while I was eating them but now I feel acid reflux what do I do from here?

Antacid. The quickest and safest remedy for occasional acid reflux (heartburn) is an antacid (Maalox, Mylanta, Rolaids whatever.) They work quickly and have virtually no drug interactions and no side effects (other than that "chalky sensation.") It's best, however, not to eat or drink anything while lying down. It's neither anatomically nor physiologically correct, as you may have noticed!