My daughter is 34, has been living with me since 32, and has been obviously ill since 31. She won’t talk of the “discharge” she has much (maybe twice in 3 years).Perhaps it is leakage. I have that problem myself at times. She does use the bathroom regularly for showers/baths/toileting, which is a positive I am grateful for. She even yells at us from inside her bedroom through the door if we use that bathroom and she doesn’t hear us wash our hands afterwards.
I have heard of someone drinking their own urine, vaguely, and at the time I was told it wasn’t harmful as urine is sterile. A separate time, someone told me there is a health benefit to it but I have never otherwise had it come up in conversation. It would disturb me if I thought my daughter was doing it. I am sorry you know that it is a problem with your daughter.