by the look of buds,you can give it 1 more week or so.but if you say there are already ambers and a lot are cloudy,means your buds are ready to smoke.If you really want to flush,start now and chop at the end of the week.BUT , this is my humble opinion , leaves are yellow,meaning plant drinking what is stored in its leaves,also meaning that your smoke is going to be smooth! you can flush yes,but it is not a necessity for your situation.Just cut off any supplements and only give that base nutrient or some kind of sugar(molasses) for the last week. Have a good harvest!