Install not complete, can't access dashboard

I installed WordPress (using Dreamhost’s one-click installer) yesterday evening and had access it to it all day. But after trying out several themes and plugins, I suddenly could not access my dashboard. I’d get an error message that the page could not be accessed. I could also not reach my wordpress login page. Thinking one of my installed themes caused this error, I deleted WordPress from my site using Dreamhost’s admin panel and then re-installed it. I got an email confirming it was installed, but when prompted to create a username, log into my dashboard, etc. I get the same error message as before. I really don’ t know how to proceed.