saffy123 - I don't know where you found articles about HRT causing VA and bladder issues to be worse!!!??? How strange!
Progesterone can aggravate the bladder if used vaginally and it is common to need to pee more often during the progesterone phase, however, oestrogen should actually improve the vaginal and bladder areas whether used locally and/or systemically. If you are having VA and bladder problems and have only recently started HRT then I'm afraid it will take 3-6 months for the oestrogen to work it's magic.
I have found the “be kind to your lady bits†very important - never using scented soaps etc. regular use of vaginal moisturisers e.g. Sylk, Multi Gyn Actigel, Replens etc. Avoid caffein, acidic drinks, spicy food etc. but drink plenty of water. It tends to be a combination of things that will eventually improve and maintain the health of our nether regions. The Estring is worth trying but do use some Multi gyn Actigel alongside. Have a browse around some of the threads about VA on this site - there are lots with some good posts.
I do hope you find relief. DG xxx