There is no such thing as white menses. Some time during your cycle, your cervical mucucs can turn white and creamy. If it does not, it is also ok. The time before menstruation is normally dry. Your last wet cervical mucus is just after ovulation. Being dry does not mean anything. It is normal.
When you get aroused, your arousal fluid is clear. It can be whitish depending on what type of cervical mucus you have, normally is just slippery and clear and will dry pretty quickly.
Did you protect yourself from infections, STDs and pregnancy when you had sex?