how come you damaged your both ear drums simulataneously. healing of injured drum depends upon size of perfoartion if its small it wil heal within 2-3 weeks period provided no infection occurs. and if its big one it may take long period or may not heal on its own it may need surgical closure. both case you allow to heal its own. avoid getting infection. avoid water entering ear keep cotton soaked in vaseline in ear while taking bath. avoid head bath as far as possible and keep dry cotton while going out especially on two wheeler. also avoid eating cold
food like ice cream and dont put anything in ear.