[urgent] 500 Internal Server Error

I am working on my site and this time when I refreshed it, it first went to the page with 500 Internal server error page….then i refreshed it again, it just went to my site without theme but text. I could not go back to my wp/admin page to do anything…does that also have to do with GoDaddy?
i dont know what to do at all…I am a beginner making this site and I have no idea how to fix this problem. Can anyone please help me??? I will appreciate a ton!!
Thank you!