Chilli Plant Wilt, black + white dots

Hey everyone,

I'm only an amateur grower, 2nd year actually. My first year was plagued by aphids, but was still succesful! This year however, I'm stumped about problem(s) with my Paper Lantern Habanero plant.

Some of the leaves near the top began to curl up, I gave it some time guesssing it was due to overwatering but no change. The leaves were soft to the touch instead of firm. (First pic)

Majority of the leaves all have these little white dots undearneath, they do fall off with scraping. A google check said it may be down to overwatering, all of my chilling plants have this to an extent.

The bigger leaves near the bottom had started to get black dots on them, with some bigger white ones.

Could anyone confirm what is the cause of the wilting, black dots and the smaller white lumps under my leaves? The other plants are healhy and are growing lots of chillis!

Much appreciated.