dap5645, sorry you are having these problems, I had this for years (since 1988) after using a contraceptive cap and it has never entirely gone away and became worse again around the menopause. After extensive investigations over a number of years, I cannot do anything about it but take Pirifur after sex which is the only medication that works for me.
Is there any particular reason why you chose Premique normal dose? Is it because you don't want to have periods? From my personal experience, oral continuous combined HRT has never worked properly at relieving symptoms, it did nothing for my constant vaginal irritation, burning and constant urination (arguably made worse by the menopause) and I am also intolerant to synthetic progestins which leads to other complications like silent migraines, breast pain and low mood.
Having been on lots of different types of HRT, the only regime that has got rid of my problems is the oestrogen gel which is bio identical and transdermal which is thought to be far more effective. Frankly, nothing else even came close to being as good as the oestrogen gel and it has got rid of the vaginal irritation and I don't need anything else apart from the Pirifur. I also take 100mg of Utrogestan for 7 days each month. I tried Ovestin but it gave me cramps and bleeding and then I developed an infection.
The symptoms you are having can really get you down and I would suggest you look at changing to medication similar to mine. What dose are you on, I could only find the low dose figures?