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.htmlExternal ↗
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.htmlExternal ↗
Discussion
This seems like you're over immagining things, you don't go to random people and speak to them freely about this things, it's stupid..