Just to add another note in case it helps anyone, I'm 5 months into testosterone now (testogel) and it really helps my bladder. If I do wake at night I don't have to get up to pee and I no longer have the constant urge to pee when I know I don't need to.
I was speaking to a lady the other day whose sister has had years of bladder problems ie sensitivity, pain, needing to pee frequently and once any serious illness was ruled out, she was prescribed testosterone. She is in her 80's and not on HRT. Apparently now she's been 12 months on it she rarely has any problems and says she has a 'normal' bladder.
Hope that may help some of you.