And me, BP through the roof when checked by 'them' but OK when I do it myself. I've got white coat syndrome in spades.
When I had women's physio, I was told that you can't really expect to empty the bladder fully. Leaning forward helps for me, but they don't advise bearing down, which was what I used to do. Coughing sounds like a good tip, and taking plenty of time.
I expect your GP appointment will be fine Blot, these things are often easier than you anticipate, and as CLKD said earlier, it's much better to start the Vagifem asap. You will be doing the right thing by keeping the appointment.
Good luck!
JP x