Discharge problem

I have been struggling with OCD and trying to get better and not take so long when doing wudhu but I keep having doubts which makes me take like 15-20 minutes for it. As a female you get discharge and the area is always wet and has a white mucus. Every time I go to do wudhu I think I have to clean all of it off but its' always there next time because it is naturally supposed to be there. So I spend so much time washing over and over again and scratching to take it all off because I think only poring water on the area doesn't clean everything because it sticks to the area 1) Is it sufficient to just wash the area with water by pouring it over 2) Do you have to scratch every little bit off? It is very time consuming and can cause pain and infections because I keep trying to remove something that is naturally there.