My begonia doesn’t seem to be doing very well. I got it very recently and noticed a few issues that I need help figuring out. It’s leaves seem a bit damaged and it just dropped a whole leaf. I’m wondering if it needs more humidity or has some type of fungal issue. I also considered it might have scales because on a few leaves I found a sticky substance but I have little experience identifying what scale damage looks like and i haven’t seen any actual scales anywhere on the plant. Does anyone have any idea of what could be wrong and how I could fix it?