Answer: First off, the toad stools are fruiting bodies of a fungus growing on some type of organic material in the potting mix such as bark. They would be a natural part of the decay process and should not harm the plant.
The stickiness is probably plant juice oozing from small holes caused by an insect feeding on the leaf above and dripping down. Scale is a common pest on this plant and it would be difficult to detect, but seeing that stickiness is often the first clue that they are in the soft stage and moving about on the plant and feeding.
If you examine the undersides of leaves you should be able to see them, small almost flat disks that seem suctioned to the leaves and stems. They can be scraped off gently with a fingernail when they are in the "soft" stage (very time consuming) or they can be treated with insectidal soap or with a very light, fine horticultural oil. Be sure to read and follow the instructions carefully and be very vigilant with the follow up as this is a difficult pest to control. when you spray make sure to contact all surfaces of the plant, top, bottom and sides.
Your county extension may also be able to help you identify the pest and offer control recommendations.
Good luck with your plant!
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