I took out my bracers around half month..If i dont wear my retainers for 2-4days will it cause any problem?

Since you recently had your braces removed your teeth are still loose (Thats what the retainers are for) If you dont wear your retainers your teeth will move around and all those payments will go down the drain . . . If you have no other choice than wait for your cousin to give you your retainers, than try not to put too much pressure on them, eat soft, and dont bite hard with your front teeth!!!