I don't know what to do.

So, the place that fired me two months ago called today.  The woman I originally talked to left a voicemail asking if I'd be interested in coming back.

I'm really not sure.  I mean, it's a job.  And I liked the work itself.  But I dread walking back into that building and seeing all those people again.  The other night, as I was trying to fall asleep, I kept replaying that final morning in my head.  It was like a nightmare.  

I called her back and left a message, after I knew everyone had gone home for the day.  I said that I would be willing to come back.

I don't know what to do.