Trazodone for sleep?

Hi lovelies

I was raped by an abusive ex a couple months after the relationship ended. That was 5.4 years ago, I finally started dealing with my trauma and side effects seriously a few weeks ago. I joined a PTSD support group and added to my med regimen. The latest discussion revolved around switching meds, we want to rule out bipolar II as a result of brain injury from the rape and may need to switch meds. The Dr added trazodone for sleep to my Lexapro and welbutrin. Has anyone tried this combination before? Results, tips?