I feel for you, this condition is really physically and mentally draining. Waiting a year for an appointment is simply unheard of when you are experiencing discomfort every day and struggling with cystitis.
Regarding the estrogen cream: it usually takes a little longer (up to 2-3 months) for the tissues to become stronger, but if the uterus is already very low, one cream may not be enough. Many people are afraid of pessaries, but in fact they often become a salvation while you are waiting for surgery. If you categorically want alternatives or simply cannot wait a year, you may want to consider a private consultation with specialists who specialize in the pelvic floor.
By the way, I have heard a lot of positive feedback about the approach to women's health at the Brooklyn Abortion Clinic - despite the name, they provide a full range of gynecological care and diagnostics. There you can usually get an examination much faster and get a clear plan of action, which is important when there is constant pain and the urge to urinate. Hold on, you are not alone with this problem, and it will definitely be solved!