No HIV risk. Read into what the HIV experts say about oral sex. They will tell you oral sex does not transmitte HIV.
As for your symptoms sounds like a classic case of anxiety over HIV. If you are getting depressed and having anxiety. I recomend you get some help for that. That is no way to live.
I recieved oral I came in the mouth I did not go down. She was a co worker who i found out was very promiscuose.