Like everyone else said, water less frequent. I water mine every 2 weeks or so. Its also possible that there is water sitting at the bottom of the outer pot so even though there are drainage holes water still has nowhere to go. Its also spring time great time to fertilize. Some places sell slow release pellets that you pit on top of the soil and it fertilizes every time you water. Definitely change the soil too, that'll do a couple of things. Fresh soil will have nutrients, if it's root bound you'll get to detangle the roots and give them room to breather, can even trim some excess roots but if you do that make sure you use sharp cutters and sanitize then with rubbing alcohol prior to use (that goes for any trimming you do). Changing the soil will also let you check for root rot (caused by overwatering). Repotting can be a daunting task, especially if it's a bigger plant but dont be scared, there are a ton of super helpful step by step videos online. A lot of places will also do it for you either for a small fee or in some cases for free if you do it at the same spot where you bought the plant. Not an expert by any means, just some stuff I learned a long the way as a plant owner. Good luck. Hopefully you save it. Worst case scenario take some cuttings of leaves that are still good and try to propagate it.