Trouble after migrating wp from utility domain to domain

I had my wordpress portfolio site located in the public folder of my utility domain (Aplus is my host). Everything worked perfectly. Then I backed up all the files in that public folder and my database before moving them over to my domain (same host). Now when I visit my site (and my WP admin panel) I get a blank page.

My host tried to help me but eventually closed the case because i was running third party installation of wp.

Can someone please help me? Thank you so much!