Urine does not have enough HIV to cause infection.
Pre-cum and cum do have enough HIV to cause infection.
You get HIV from somebody else. Through unprotected sex, sharing dirty needles, infected mother to child.
If you are worried about everything, stop worrying, wait 90 days and get a blood test for HIV. Then, wait another 90 days, test again. In between do not engage in activities mentioned above.
Then my dear, you will be sure about your status and not worry.
I recommend that you Google how HIV is spread and educate yourself. Education is power. Then you don't go through life in fear of water drops.
On my initial post I wanted to say HIV dies 30 seconds to a minute after hitting the air.
Also I wanted to add that fluids that have HIV are blood, semen, precum, vaginal fluids including periods and breastmilk.
Please ask any questions.
Always
Muthoni (Mson)