Curcuma longa is the botanical name for the turmeric, so you are fine there. On a miligram scale, I find that a level teaspoon of turmeric powder weights around 1.5 grams, so to get a an approximate 1 gram dose you want a little bit less than a level teaspoon.
If you have any Asian shops near you, they often sell a large bag of turmeric powder for cooking quite cheaply. If not, look
online.
Yes, I am still on the same regimen, and it still works well. I also take vitamin A 25,000 IU daily, and vinpocetine 10 mg daily which also reduce inflammation and anxiety.
If I have a bad day were I feel the anxiety is creeping back, I will add to the regimen arginine pyroglutamate powder 1 heaped teaspoon (5 grams) on that day.