Hello...I was wondering if someone would be able to let me know if I need to be concerned or not. I was given a large Phal a few weeks ago and it was doing great up until the other day. It had six flowers...two of which had brown spots and fell off. Four unopened ones have fallen off and two more look like they're about to do the same thing.

It has six leaves, all dark green. One of the older leaves is quite small and look slightly shrivelled. It has one tiny black bug (but if there's one there are probably more) on it's underside. Another leaf looks like it's starting to go all shrivelly too. I've also noticed a very tiny pale bug on one of the leaves. A few of the leaves have whitish patches on them, and one of the leaves has small dark bumps on it's surface.

I was wondering if any of these things are cause for concern and if so, what do I do about them.

Thank you so much!