Can't Access Pages Menu from Dashboard

I am on the default theme, and everything worked perfectly until I tried placing all pages except on and a child to a page (to just have one tab) and now I cannot view or edit the pages from the dashboard. At first I couldn’t see anything on my blog at all it was just a white screen, then I logged into the dashboard installed a plug-in to separate them, so now they are all visible, but if you click on a page it goes nowhere (blank page) and on the backend I can’t access it (blank page) I tried to make a new page called ‘test’ and it allowed me to create it but not view it. So installed another plug in called ‘My Page Order’ just to see if it would allow me to see the pages, and it sort of those, however it only shows where I can move the ‘Test’ page. All of my other pages are missing. BTW after doing all of this I deactivated all plug-ins (didn’t work) changed the plug-in folder name just to make sure (didn’t work), checked permalinks (even though I never changed them from default) just updated again that it was still default (didn’t work) have tried three different themes still not working.

So in a nutshell how do I gain back access to my ‘Pages’ option in the dashboard and functionality on the front end? Everything else works fine, no errors are popping up to give me clue.

Thanks in advance!