Can you kill yourself with trazodone and Valium mixed together?

im not sure, but i take 300 mg of wellbutrin every day and my boyfriend gave me 150mg of trazodone to help me sleep. i only took a third of it because i didnt know how it would end out. i had a migraine so bad the next morning i was dizzy and the pain was almost unbearable, pain killers did nothing. i had to stay out of school, now three days later and the pain has only gone down a little bit.