wp-admin not loading

Hello! I am a very non-technical person, so although I have read through many posts here, I’m not sure that I understand.

I am not able to load: thedaysofgifts.com/wp-admin

I have logged into my cPanel on Bluehost, but I don’t know exactly which file to delete or change the name of. I’m also not entirely sure how to disable plugins if I can’t log in to the site.

Could someone please help me? I would really appreciate it!