How often do you work on your aura? The stronger it is, the more negativity/curses it repels. You can even specifically program to do so if you want.
This link might also help you avoid this in the future
http://www.angelfire.com/empire/serpent ... akras.html
Idk about the green gem thing. But if you want extra protection, hematite and black tourmaline can repel negative energies if you program then with certain runes.
http://www.angelfire.com/empire/serpent ... balah.html
