Leaving shift due to sexual activity

A few years ago, I was the victim of sexual assault. Just recently I was working as a DSP and had a resident who had, on 2 previous occasions, attempted to simulate a sexual act on my leg. I wrote up both occurrences. A week after the last time, the resident became much more aggressive (he also has violet to outbursts), and followed me through the house, laying down and simulating sex on the floor, while continually reaching for me. This went on for 10 minutes. Nothing I did would redirect him. The house was a 2 staff house, but the other staff ignored what was happening, because they were on their phone. Finally, I snapped and had a trauma response. I had to get away. I went outside where I was crying uncontrollably. I called my supervisor and explained what happened. I had already tried multiple time to call our on call, but no one was answering. Through our conversation I told my supervisor that I couldn't stay there. I even had attempted to find my own coverage. I spoke with the other staff member, who was OK staying alone for a few hours, or until replacement staff arrived. My supervisor had given me permission to not have to wait for on call, but in my condition, I assumed that was permission to leave. I left my shift.

Now I am on suspension for abondonment, which I understand, they have to investigate, but would I have extenuating circumstances or should I expect to be terminated?