I am sorry to hear your girl is having problems.
Blood in the urine and the inability to urinate can be symptoms of not only infection but also bladder stones, kidney stones, or crystals in the urine.
This breed is known to develop bladder stones. If this is the case antibiotics may not work.
Bladder stones can block the urethra making it impossible to pass urine, this can lead to serious and dangerous toxin build up in the blood.
I would recommend having her seen by your vet for a proper diagnosis and medication if needed.
As for the Batrim this is used in dogs but is not normally used for this problem, please know that if she does not drink enough while using this medication she can become become dehydrated causing sulfa crystals to form in the urine which will create additional problems.
Here is information on this drug.
I hope this has been helpful, please reply back if you have additional questions or concerns