Feed address getting error message

I had to move my blog yesterday to a new hosting account and now my feed isn’t working. Nothing changed as far as the URL of the account, so everything should be the same. Doesn’t WP automatically generate a feed address? In my case this would be http://theresasheridan.com/blog/feed, however I get a 404 error message for this, and my feedburner feed address of http://feeds.feedburner.com/theresasheridan/npiy takes me back to my blog….sort of….it’s a version where the theme hasn’t been modified, etc.
I have no clue how to fix this right now, since I had no feed issues prior, so clearly changing the hosting account has messed things up. Help please!