I don’t know what else to do with this watermelon peperomia :( Leaves started blackening and falling sometimes the leaf was fine but the stem got black and they fall the ones that didn’t fall are droopy, when this started I thought it was too much water, them I thought not enough moisture, I tried so many different things, the app says it could be so many things its no help. I don’t know what else to do. Any tips? Should I give up on her?