no there is nothing that can reverse overwatering, just wait till they dry. Next time dont water till the pot is light and the soil is dry for a couple inches.
I'll try to be nice and save you from some one else who would rip you a new one. IF you overwatered your plant, just WAIT. Theres no need to do anything else at all. Dont water your plant as often. Water it thoroughly, then let it dry out....repeat. Lift your pot after you water it, note how heavy it feels. When its dry it will be MUCH lighter.
when that happend to me i re-potted the plant, its leaves purked up but the growth is stunted, it hasnt grown in a week. its only a 2 inch tall 12 day sprout that is stuck at day 6 of sprout