You can use some estriol cream on the vulva and around the urethra as well as using it internally. I use Vagifem 5 times a week, plus estriol cream externally. How often were you using Vagifem? If it was only the recommended 2 a week you may have needed it more often. As the Vagifem dose is now only 10 mcg, and there used to be a 25 mcg version, using 5 a week would give you the "old" weekly dose of 50 mcg.
Can't imagine why they have given you estriol cream rather than Ovestin, as they usually go for Ovestin first. However, the amount of cream you are getting with the (huge) applicator will deliver an equivalent dose to one Vagifem. Note that Vagifem is estradiol, not estriol, but that doesn't matter as both will work.
JP x