This is the same issue I'm having at the moment. I have only got 1 offer and it's a conditional so I've firmed it, however, because of an incident regards to the area I no longer can see myself going there. However, I don't want to withdraw and go through extra incase I don't get another offer and end up not going anywhere at all. And adjustment will be harder accommodation wise!
I've emailed a uni that offered me an interview but turned it down, to reconsider me for a different course (journalism instead of media and journalism) so I'm waiting for them to get back to me before I make any decisions. Why not try email universities before making any final decisions?