Question with interaction of weed and dxm

So I have a 500mg of edible that im curious if id be okay with taking 550mg of poli dxm? I tried looking for answers but I got nothing and lowkey fell for the fear mongering and if its gonna mess with my heart a shit ton then I dont wanna die yk? But ya! Im curious if ill be okay, if its safe, and what itd be like?