When I try to log on to my Admin dashboard I am redirected to
The first thing I did was google the problem. I found plenty of search results, but many were outdated by 6 months to a year. From just looking at the url I imagine that the problem was caued by my recent upgrade to WordPress's v3.4.1 (I was in the dashboard the other day and did it that way). It is fortunate that at the very least the website seems perfectly fine to outside viewers, but I need to update some materials ASAP.
I have seen certain suggestions such as downgrading to an earlier version but that is not possible here because I do not think I have any recent backups.
How can I fix this? Prerabbly without losing the current content and theme I have.
Note: I have access to my site through FTP abut not my host panel (though I'm working on getting that from my collegue who is the one who has that information).