I had pain in my mouth and can I contract HIV?

I was masturbating and I did it with my right hand while I touched the testes and the computer with my left hand. After masturbating, I touched the mouth of the water can and drank the water. I had some pain in the lower jaw in the gums but there was no blood coming. What if I had HIV virus in my virus and it entered through the water. Is HIV exposure possible here?