The reason plants droop after being over-watered is due to the lack of oxygen in the root zone. So you're going to have to wait until the soil dries out before they'll perk up again. You can try putting some aeration holes in the soil with a small skewer to help add oxygen to the roots - just be careful you don't damage any roots by doing so.

Depending on the age of the plant, should you be feeding babybio at this stage? Also try and learn and understand the 'wet/dry' method of watering.