how much of the omega-3's daily???

the more i read on the internet, the more i ??? the real truth!!!! please tell me how much of the omega-3's i should take?? i have no medical insurance because brain surgery 15 years-ago. i'm trying to fix myself, not a easy task. But for the first time in my life i understand what's going on in my head. My family dr. is trying different meds to help me. i have lots of HOPE!!!