Get some 'vagifem' or 'ovestin'. Ring your Surgery today and ask. The former is a pellet inserted into the vagina, the latter is inserted via an applicator which can be washed after use. I find that latter satisfactory.
Occasionally there is enough active ingredient to cause side effects which should settle during the initial 2/3 nights loading treatment; i.e. soreness of breasts. Which HRT have you been prescribed?
A moisture won't replace the oestrogen being lost, some ladies do use VA treatment as well as 'yes', 'sylc' or other products. I find KY jelly enough when necessary.