I am currently renovating my kitchen, and have a plasterer coming to
skim the walls/ ceiling.

The ceiling is Artex, and the plasterer has asked me to knock the
points off.

I thought, I know, I'll try the sander.

Anyway, after about 5 minutes, and a huge cloud of dust, realised that
sanding probably wasn't a good idea.

Did a quick google search on Artex removal and found, to my horror,
that, up until the 80's asbestos was used in Artex and that removal is
a specialist job.

I have no idea when this Artex was applied, - I'm guessing early 80's.

I wasn't wearing any kind of dust mask etc.

Do I have any thing to really worry about?