Sounds like you have an infection. Your doctor will prescribe a suitable cream to put on. You might find that your partner also has to be treated at the same time.
What If You Have An Odor To Your Private Area As The White Mucus-like Discharge Releases?
It could be a yeast infection if it also itches, but if it is an STD you need to go to the doctor and be tested so he can prescribe antibiotics.