In general settings yesterday, I changed the wordpress URL by accident trying to move my site to the main url out of the /wordpress directory. After a couple hours on the phone with my hosting company, they were able to have me make a change that got me back into the wordpress admin for the site, (even though they said they don't support it and wouldn't help with that kind of issue again).
So I was in and all looked good and I ended my call with them. Then I started trying to access things from the dashboard and found that I still can't access. If I click "comments" I get "The page cannot be found" error. If I click posts, pages, anything, I get the same error message. All my images placed within a post or page are missing on the site too. Basically, nothing works in my dashboard and photos are missing on my site which is now live at my url that receives hundreds of hits a day.
I am not a programmer so please leave step-by-step instructions on how to fix this. Very desperate.