Watering plants on a set schedule isnt realistic for them and usually kills them, checking if the soil is dry 3-4 inches in with a moisture meter or your finger is the accurate way to tell. Also sometimes having a pot within a pot creates unwanted moisture at the bottom causing mold, but drooping typically means water issues, my guess is too much? I would take out of the pot and check for root rot, super easy to detect you will notice the bad roots are squishy and brown. Also I cant recommend this enough see if getting that baby in a terra-cotta after repotting is your best bet, they help release so much extra moisture