Accusation of Med error

I need some direction on this matter. In November last year I signed up for a 13 weeks travel assignment with an urgent to work in some facility in Arizona. The place was so welcoming and l had a 3 day orientation with a very friendly staff. I have been an LVN since 2012 and since then l have in various institutions mostly rehab centers. So l am familiar with most of the systems used.  At this particular place, l used to work a 22 hour shift, from 7 pm to 7 am. I enjoyed my work and took my time especially when it came to medication administration. Residents began warm up to me as l would share some jokes with them. I was at the beginning of my 5 th week when l received a message from my Agency that the "facility" had demanded that l should not report for duty the following day since l had a med error . No one told me when the med error happened and what really happened. I tried to contact the urgency and no one responded. I also tried to find out from the facility what exactly happened and no one seems to have an answer. I finally bought a last minute ticket to fly back to my state. This things had haunted me so much. I have not been able to work since then and l going through depression right now. This urgency just called me to offer me another job somewhere with a lower pay rate. But they don't want to address my issue