Die Off : Very Very Severe Depression. feel like commit sucide. Anybody know what kinds of germ or bacteria cause this symptom?

this is about my "Die off" experience. for about 2 weeks of anti parasitic herbs intake, I have experienced very strange symptom.
for about 3 days, I did have very very severe depression. feel like I am going to commit a sucide. I have never felt that kind of Depression in my 38years of whole life time.
Anybody know what kind of germ or bacteria causes this severe depression?
I am not fully recovered yet but I would like to know what kind of parasitic I got infected.
thank you