I've been nervous for a few days how can i stop it or ignore it?

Try to eliminate: all commotion and go to a quiet room, close your eyes and breathe deeply this hopefully will relax you and decrease the anxiety

Nerves: Deep breaths and take some walks or other active activity. If you would like to try something GABA from the health food store may help.

Depends on cause: This depends on the underlying cause. If, like the majority of Americans, you're deficient in magnesium, taking magnesium taurate or glycinate will help. If related to stress, relaxation techniques like meditation & counseling should help. Exercise usually helps a lot. Eat a healthy diet with lots of organic veggies,fruit & protein. B complex and herbs like Ashwagandha, Holy Basil & Rhodiola help.