Vagifem is for plumping up the vagina to improve oestrogen levels. It needs to be used regularly to avoid drying out = aggravation of surrounding area.
Have you read the other threads relating to bladder problems?
Urine infections need appropriate treatment, if necessary, after tests, anti-biotics. Localised HRT will ease symptoms of 'infections'. I sometimes need to take a pain relief tablet too. Trial and Error can be tiring.