If lubricants such as K-Y Jelly don't work for you, there are non-hormonal vaginal moisturizers that may help with regular application, such as K-Y Liquibeads or Replens. Some people also have success from olive or coconut oil, Vitamin E, nearly pure Aloe Vera, Sylk, or Corn Huskers Lotion.
Best wishes...
you should NEVER use anything until you clear it with your Oncologist. If these are the only side effects you are experiencing then you are VERY fortunate. Please ck. with your Oncologist before using any type of medication or treatment. Regards ....