Cant log in

Change the urls back. See Changing_The_Site_URL.

But how can i get onto the general settings if i cant long in?

Now try reading the page at the link I posted above.

I have multiple sub domains though, is this ok?

Yes – if you follow the directions carefully for one of the methods listed in that page (I would suggest the functions.php method).

Ok i will try it, thank you!