I would be harvesting asap, before the plant dies completely.
Mould will be mushy and soft, you will know when you see it, (as it is quite obvious when you do see it), and cut it all off and throw it in the garbage, as it is not safe to consume or use mouldy buds in any way.
The issue with this plant was not caused by mould, it is just an over ripe plant knocking on deaths' door.
Hope this helps, Organoman.