how long is she being held in the crate? She should be let out to urinate every 3-4 hours; this is the longest their little bladders can physically hold urine. Do ou take her out to urinate right before she goes in the crate?
is t here any way you could get a neighbor to let your dog out before 7 hours? I can't believe your pup has made it as long as she has w/out going in the crate! If there is no other way for you to break the day up for her, I think the only thing you can do is let her urinate immediatelt before taking her into the crate. Does she have a "kong" toy to occupy and entertain her? She may be bored, or acting out. If it continues I'd call the vet to rule out a UTI, and if it is behavioral, you may need to find a way to get her relief before 8 hours!